Mỳ Second Grade Math 3rd week test

Day 13 #1: What is 200 + 300? A) 400 B) 500 C) 600 D) 550

B) 500

Day 13 #2: 342 + 5 = ___

347

Day 13 #3: In 456 + 128, the ones column requires regrouping because 6 + 8 = 14. (True or False?)

True (6 + 8 = 14 >= 10)

Day 13 #4: Solve vertically: 345 + 218 = ?

563 (5 + 8 = 13, carry 1 ten; 1 + 4 + 1 = 6; 3 + 2 = 5)

Day 13 #5: 460 + 70 = ___ (Think: 46 tens + 7 tens = ___ tens).

530 (53 tens)

Day 13 #6: What is the sum of 537 + 248? A) 775 B) 785 C) 786 D) 685

B) 785 (7 + 8 = 15, carry 1; 1 + 3 + 4 = 8; 5 + 2 = 7)

Day 13 #7: 380 + 250 = 630. (True or False?)

True (380 + 250 = 630)

Day 13 #8: Find the missing addend: 450 + ___ = 520

70 (520 - 450 = 70)

Day 13 #9 (Word Problem): An elementary school collected 328 cans of food on Monday and 245 cans on Tuesday. How many cans were collected in all?

573 cans (328 + 245 = 573)

Day 13 #10: Which problem requires regrouping twice (both ones and tens)? A) 412 + 235 B) 526 + 147 C) 378 + 265 D) 604 + 192

C) 378 + 265 (Ones: 8 + 5 = 13 >= 10; Tens: 1 + 7 + 6 = 14 >= 10)

Day 13 #11: Solve: 487 + 365 = ___

852 (7 + 5 = 12, carry 1; 1 + 8 + 6 = 15, carry 1; 1 + 4 + 3 = 8)

Day 13 #12: When adding 675 + 189, the digit in the tens place of the answer is 6. (True or False?)

True (5 + 9 = 14, carry 1; tens: 1 + 7 + 8 = 16, write 6 carry 1)

Day 13 #13 (Word Problem): A zoo had 456 visitors on Saturday morning and 387 visitors on Saturday afternoon. How many total visitors came to the zoo on Saturday?

843 visitors (456 + 387 = 843)

Day 13 #14: Find the missing digits A and B: 3A6 + 24B = 581

A = 3, B = 5 (6 + B = 11 -> B = 5; 1 + A + 4 = 8 -> A = 3)

Day 13 #15 (Challenge): A delivery truck carried three crates. Crate 1 weighed 248 pounds. Crate 2 weighed 375 pounds. Crate 3 weighed 189 pounds. What is the total weight of all three crates combined?

812 pounds (248 + 375 + 189 = 812)

Day 14 #1: What is 500 - 200? A) 200 B) 300 C) 400 D) 700

B) 300

Day 14 #2: 648 - 25 = ___

623

Day 14 #3: To solve 400 - 153, you can subtract 1 from both numbers and solve 399 - 152. (True or False?)

True (400 - 153 = 399 - 152 = 247)

Day 14 #4: Solve vertically: 562 - 238 = ?

324 (Borrow 1 ten: 12 - 8 = 4; tens: 5 - 3 = 2; hundreds: 5 - 2 = 3)

Day 14 #5: 700 - 1 = ___

699

Day 14 #6: What is 600 - 247? A) 353 B) 363 C) 453 D) 357

A) 353 (600 - 247 = 353)

Day 14 #7: 504 - 138 = 366. (True or False?)

True (504 - 138 = 366)

Day 14 #8: Complete the decomposition: 1 hundred = ___ tens = 100 ones.

10 tens

Day 14 #9 (Word Problem): A bookstore had 500 copies of a popular comic. By evening, 324 copies were sold. How many copies were left?

176 copies (500 - 324 = 176)

Day 14 #10: What is 723 - 458? A) 265 B) 275 C) 365 D) 264

A) 265 (723 - 458 = 265)

Day 14 #11: 805 - 347 = ___

458 (805 - 347 = 458)

Day 14 #12: 900 - 456 = 444. (True or False?)

True (900 - 456 = 444)

Day 14 #13 (Word Problem): Flight 802 is scheduled to fly 750 miles. So far, the airplane has flown 486 miles. How many miles remain on the flight?

264 miles (750 - 486 = 264)

Day 14 #14: Find the missing digit : 60 - 248 = 355

_ = 3 (Decompose: 13 - 8 = 5; tens: 9 - 4 = 5; hundreds: 5 - 2 = 3)

Day 14 #15 (Challenge): At a carnival, 900 prize tickets were available. On Friday, 264 tickets were won. On Saturday, 388 tickets were won. How many prize tickets were left for Sunday?

248 prize tickets (264 + 388 = 652; 900 - 652 = 248)

Day 15 #1: Which of the following numbers is EVEN? A) 13 B) 17 C) 20 D) 25

C) 20

Day 15 #2: A number ending in 1, 3, 5, 7, or 9 is called an ___ number.

odd

Day 15 #3: The number 486 is even because its ones digit is 6. (True or False?)

True (Even numbers end in 0, 2, 4, 6, 8)

Day 15 #4: Can 14 socks be matched into complete pairs with none left over? (Yes / No)

Yes (14 = 7 pairs)

Day 15 #5: Write 18 as the sum of two equal addends: 18 = ___ + ___.

9 + 9

Day 15 #6: Which sum will result in an EVEN number? A) 4 + 5 B) 7 + 3 C) 8 + 9 D) 2 + 7

B) 7 + 3 (7 + 3 = 10, an even number)

Day 15 #7: An odd number plus an odd number always equals an even number. (True or False?)

True (Odd + Odd = Even)

Day 15 #8: The largest 2-digit even number is ___.

98

Day 15 #9 (Word Problem): Maya has 17 flowers. She wants to divide them equally into 2 vases without cutting any flowers. Can she do it evenly? Explain.

No. 17 is an odd number and cannot be split into two equal whole numbers without a remainder (8 + 8 = 16, leaving 1 flower).

Day 15 #10: Look at this set: {112, 235, 478, 691, 804}. How many numbers in the set are even? A) 2 B) 3 C) 4 D) 5

B) 3 (112, 478, 804)

Day 15 #11: If you add 1 to any even number, the result is always an ___ number.

odd

Day 15 #12: The sum of 342 and 159 is an even number. (True or False?)

False (Even + Odd = Odd; 342 + 159 = 501)

Day 15 #13 (Word Problem): Coach Dave has 23 soccer players. He wants to create two teams with the exact same number of players. Can he do this without a substitute player? Why or why not?

No. 23 is an odd number; dividing into two equal groups leaves 1 player leftover (11 + 11 = 22).

Day 15 #14: I am an odd number between 60 and 70. The sum of my digits is 11. What number am I?

65 (Tens digit is 6; 6 + 5 = 11; 65 is odd and between 60 and 70)

Day 15 #15 (Challenge): Lucas adds three numbers together: two are odd, and one is even. Will his final sum be even or odd? Test your theory with an example.

Even. Two odds add to an even (Odd + Odd = Even); adding another even produces an even (Even + Even = Even). Example: 3 + 5 + 4 = 12 (even).

Day 16 #1: In an array, horizontal lines of objects running from left to right are called: A) Columns B) Rows C) Diagonals D) Pairs

B) Rows

Day 16 #2: An array has 3 rows with 2 dots in each row. The total number of dots is ___.

6 (2 + 2 + 2 = 6)

Day 16 #3: An array with 4 rows and 3 columns has the same total number of objects as an array with 3 rows and 4 columns. (True or False?)

True (4 x 3 = 12 and 3 x 4 = 12)

Day 16 #4: Write a repeated addition sentence to find the total for 4 rows of 5 stars: ___ + ___ + ___ + ___ = ___

5 + 5 + 5 + 5 = 20

Day 16 #5: Complete the repeated addition sentence: 3 + 3 + 3 + 3 + 3 = ___.

15

Day 16 #6: Which repeated addition equation represents an array with 2 rows and 4 columns? A) 2 + 2 = 4 B) 4 + 4 = 8 C) 4 + 2 = 6 D) 2 + 4 = 6

B) 4 + 4 = 8 (2 rows of 4)

Day 16 #7: 5 + 5 + 5 = 15 can represent 3 rows of 5 objects. (True or False?)

True

Day 16 #8: An array of stamps has 5 columns with 4 stamps in each column. The total number of stamps is ___.

20 (4 + 4 + 4 + 4 + 4 = 20)

Day 16 #9 (Word Problem): A baker arranges cookies on a baking sheet in 4 rows with 4 cookies in each row. How many cookies are on the sheet?

16 cookies (4 + 4 + 4 + 4 = 16)

Day 16 #10: Which array has a total of 12 items? A) 2 rows of 5 B) 3 rows of 4 C) 4 rows of 4 D) 5 rows of 2

B) 3 rows of 4 (3 x 4 = 12)

Day 16 #11: Write the addition sentence represented by columns: If an array has 3 columns with 5 items each: 5 + 5 + 5 = ___

15

Day 16 #12: An array can have 0 objects in a row and still be an array. (True or False?)

False (Arrays must contain non-zero rows and columns of objects)

Day 16 #13 (Word Problem): Chairs in a music room are placed in 5 equal rows. Each row has 5 chairs. How many total chairs are set up in the room?

25 chairs (5 + 5 + 5 + 5 + 5 = 25)

Day 16 #14: Draw or describe two DIFFERENT arrays that each have a total of 18 items. List their rows and columns.

Array 1: 2 rows of 9 (9 + 9 = 18). Array 2: 3 rows of 6 (6 + 6 + 6 = 18). (Acceptable alternative: 1 row of 18, 6 rows of 3, 9 rows of 2).

Day 16 #15 (Challenge): Farmer Emma planted a rectangular vegetable garden with 4 rows of cabbage, and 5 cabbages in each row. Later, rabbits ate 3 cabbages from the garden. How many cabbages are left?

17 cabbages (4 x 5 = 20; 20 - 3 = 17)

Day 17 #1: A library had 340 books. They bought 125 more books. How many books do they have now? A) 455 B) 465 C) 475 D) 460

B) 465 (340 + 125 = 465)

Day 17 #2: A parking lot has 4 rows of cars with 5 cars in each row. The total number of cars is ___.

20 (4 x 5 = 20)

Day 17 #3: If a store had 600 bottles of juice and sold 280, there are 420 bottles left. (True or False?)

False (600 - 280 = 320)

Day 17 #4: A runner ran 415 meters on Monday and 390 meters on Tuesday. How many meters did she run across both days?

805 meters (415 + 390 = 805)

Day 17 #5: An auditorium has 3 rows of 6 seats. A class of 17 students sits down. There will be ___ empty seat(s) left.

1 (3 x 6 = 18 total seats; 18 - 17 = 1 empty seat)

Day 17 #6: Marcus had $500. He bought a bicycle for $235 and a helmet for $45. How much money did Marcus have left? A) $220 B) $230 C) $310 D) $210

A) $220 ($235 + $45 = $280; $500 - $280 = $220)

Day 17 #7: 2 rows of 8 chairs has the same total as 4 rows of 4 chairs. (True or False?)

True (2 x 8 = 16 and 4 x 4 = 16)

Day 17 #8: A school had 750 students. 385 were girls. There were ___ boys.

365 boys (750 - 385 = 365)

Day 17 #9 (Word Problem): A factory produces 238 toys on Wednesday, 314 on Thursday, and 195 on Friday. How many toys were produced in these three days?

747 toys (238 + 314 + 195 = 747)

Day 17 #10: A box holds chocolates in 3 rows with 5 chocolates in each row. Liam eats 4 chocolates. How many chocolates remain in the box? A) 15 B) 12 C) 11 D) 10

C) 11 (3 x 5 = 15; 15 - 4 = 11)

Day 17 #11: Complete the balance: 320 + 180 = 600 - ___.

100 (320 + 180 = 500; 600 - 500 = 100)

Day 17 #12: If a school garden has 5 rows of 3 carrots, that is a total of 15 carrots. (True or False?)

True (5 x 3 = 15)

Day 17 #13 (Word Problem): On a train, there are 432 passengers in car A and 389 passengers in car B. At the next stop, 145 passengers get off the train. How many passengers remain on the train?

676 passengers (432 + 389 = 821; 821 - 145 = 676)

Day 17 #14 (Word Problem): Elena planted flowers in an array with 4 rows and 5 flowers in each row. Her brother planted flowers in an array with 3 rows and 6 flowers in each row. Who planted more flowers, and by how many?

Elena planted more flowers by 2. (Elena: 4 x 5 = 20; Brother: 3 x 6 = 18; 20 - 18 = 2)

Day 17 #15 (Challenge): A theater has 800 total seats. * Section 1 has 285 seats filled. * Section 2 has 348 seats filled. * The rest of the seats are empty. How many empty seats are in the theater?

167 empty seats (285 + 348 = 633 seats filled; 800 - 633 = 167)

Day 18 #1: What is 468 + 375? A) 833 B) 843 C) 743 D) 841

B) 843 (468 + 375 = 843)

Day 18 #2: 800 - 364 = ___

436 (800 - 364 = 436)

Day 18 #3: The number 573 is an even number. (True or False?)

False (573 ends in 3, so it is odd)

Day 18 #4: Solve vertically: 902 - 457 = ?

445 (Decompose across zero: 12 - 7 = 5; tens: 9 - 5 = 4; hundreds: 8 - 4 = 4)

Day 18 #5: Write the repeated addition sentence for an array with 4 rows and 3 columns: 3 + 3 + 3 + 3 = ___

12

Day 18 #6: Which of the following equals an odd number? A) 14 + 16 B) 21 + 13 C) 35 + 24 D) 40 + 18

C) 35 + 24 (35 + 24 = 59, odd)

Day 18 #7: 500 - 189 = 311. (True or False?)

True (500 - 189 = 311)

Day 18 #8: 647 + 288 = ___

935 (647 + 288 = 935)

Day 18 #9 (Word Problem): A warehouse held 700 boxes. Workers shipped out 286 boxes in the morning and 175 boxes in the afternoon. How many boxes remain in the warehouse?

239 boxes (286 + 175 = 461; 700 - 461 = 239)

Day 18 #10: An array has 5 rows and 4 columns. Which expression does NOT find the total number of objects? A) 4 + 4 + 4 + 4 + 4 B) 5 + 5 + 5 + 5 C) 5 x 4 D) 5 + 4

D) 5 + 4 (Addition of the dimensions does not give the total items)

Day 18 #11: Any whole number ending in 0, 2, 4, 6, or 8 is ___.

even

Day 18 #12: When adding 458 + 279, you regroup both in the tens place and in the hundreds place. (True or False?)

True (Ones: 8 + 9 = 17, carry 1 ten; tens: 1 + 5 + 7 = 13, carry 1 hundred)

Day 18 #13 (Word Problem): A bakery makes cupcakes in trays of 4 rows with 5 cupcakes in each row. They baked 3 full trays. How many cupcakes did the bakery make altogether?

60 cupcakes (1 tray = 4 x 5 = 20; 3 trays = 20 + 20 + 20 = 60)

Day 18 #14 (Challenge): Fill in the missing digits X and Y: 7X4 - 38Y = 346

X = 3, Y = 8 (14 - Y = 6 -> Y = 8; after borrowing: (X - 1) - 8 = 4 -> borrow from 7: (10 + X - 1) - 8 = 4 -> X - 1 = 2 -> X = 3; hundreds: 6 - 3 = 3)

Day 18 #15 (Challenge): * Clue 1: I am a 3-digit even number less than 500. * Clue 2: My hundreds digit is 4. * Clue 3: My tens digit equals 3 x 2. * Clue 4: The sum of my three digits is 14. What number am I?

464 (Hundreds = 4; tens = 3 x 2 = 6; ones digit = 14 - (4 + 6) = 4; 464 is even and less than 500)# Week 3