Mỳ Second Grade Math 2nd week test

Day 7 #1: What is 30 + 40? A) 60 B) 70 C) 80 D) 75

B) 70

Day 7 #2: 54 + 3 = ___

57

Day 7 #3: When adding 42 + 35, the sum of the ones digits is 7. (True or False?)

True (2 + 5 = 7)

Day 7 #4: Solve vertically: 23 + 14 = ?

37

Day 7 #5: Break apart to add: 32 + 45 = (30 + 40) + (2 + 5) = 70 + ___ = 77.

7 (70 + 7 = 77)

Day 7 #6: What is the sum of 61 + 27? A) 87 B) 88 C) 98 D) 78

B) 88

Day 7 #7: 50 + 26 = 76. (True or False?)

True

Day 7 #8: 71 + ___ = 79

8 (79 - 71 = 8)

Day 7 #9 (Word Problem): Sarah has 34 red buttons and 23 blue buttons in a jar. How many buttons does she have in total?

57 buttons (34 + 23 = 57)

Day 7 #10: Which addition problem does NOT require regrouping? A) 38 + 14 B) 47 + 25 C) 52 + 36 D) 29 + 13

C) 52 + 36 (2 + 6 = 8 <= 9)

Day 7 #11: 15 + 42 + 21 = ___

78 (15 + 42 = 57; 57 + 21 = 78)

Day 7 #12: Adding 0 to any 2-digit number changes the tens place. (True or False?)

False (Adding 0 leaves the number unchanged)

Day 7 #13 (Word Problem): A toy store sold 21 puzzles on Saturday and 43 puzzles on Sunday. On Monday, they sold 14 more puzzles. How many total puzzles were sold over the three days?

78 puzzles (21 + 43 = 64; 64 + 14 = 78)

Day 7 #14: Fill in the missing digits marked with letters: 4A + B3 = 78 What are the values of A and B?

A = 5, B = 3 (5 + 3 = 8; 4 + 3 = 7)

Day 7 #15 (Word Problem): Farmer John has two coops. Coop 1 has 32 brown hens and 15 white hens. Coop 2 has 20 brown hens and 21 white hens. Which coop has more hens in total, and what is the difference between the two coops?

Coop 1 has more by 6 hens. (Coop 1: 32 + 15 = 47; Coop 2: 20 + 21 = 41; 47 - 41 = 6)

Day 8 #1: What is 27 + 5? A) 31 B) 32 C) 33 D) 22

B) 32

Day 8 #2: In the problem 48 + 26, adding the ones digits (8 + 6) gives ___, which is 1 ten and 4 ones.

14

Day 8 #3: 39 + 15 = 54. (True or False?)

True

Day 8 #4: Solve vertically, showing the regrouped ten: 58 + 27 = ?

85 (8 + 7 = 15, carry 1 ten; 1 + 5 + 2 = 8)

Day 8 #5: 64 + 19 = ___

83

Day 8 #6: Which pair of numbers adds up to exactly 80? A) 45 + 25 B) 36 + 44 C) 52 + 38 D) 41 + 49

B) 36 + 44 (36 + 44 = 80)

Day 8 #7: When adding 67 + 25, you must regroup a ten because 7 + 5 is greater than 9. (True or False?)

True (7 + 5 = 12 >= 10)

Day 8 #8: 46 + ___ = 63

17 (63 - 46 = 17)

Day 8 #9 (Word Problem): Marcus collected 48 baseball cards. His uncle gave him 37 more cards for his birthday. How many cards does Marcus have now?

85 cards (48 + 37 = 85)

Day 8 #10: What is 19 + 75? A) 84 B) 94 C) 93 D) 104

B) 94

Day 8 #11: Complete the sum: 28 + 37 + 15 = ___

80 (28 + 37 = 65; 65 + 15 = 80)

Day 8 #12: If the ones digits of two 2-digit numbers add up to 9, you must regroup a ten. (True or False?)

False (Regrouping only occurs when the sum of digits is 10 or greater)

Day 8 #13 (Word Problem): In an apple orchard, 38 apples fell in the morning and 49 apples fell in the afternoon. A basket can hold 85 apples. Will all the fallen apples fit into one basket? Explain why or why not.

No. 38 + 49 = 87 apples. Since 87 > 85, they will not all fit (2 apples will overflow).

Day 8 #14: Find the missing digit : 3 + 47 = 85

_ = 8 (8 + 7 = 15, write 5 carry 1; 1 + 3 + 4 = 8)

Day 8 #15 (Challenge): Elena had some stickers. She gave 28 stickers to her sister and 19 stickers to her best friend. She still has 36 stickers left. How many stickers did Elena start with?

83 stickers (28 + 19 = 47 given away; 47 + 36 = 83 total at start)

Day 9 #1: What is 60 - 20? A) 30 B) 40 C) 50 D) 80

B) 40

Day 9 #2: 48 - 5 = ___

43

Day 9 #3: 75 - 32 = 43. (True or False?)

True

Day 9 #4: Solve vertically: 89 - 43 = ?

46

Day 9 #5: 96 - 40 = ___

56

Day 9 #6: What is 57 - 24? A) 33 B) 34 C) 23 D) 31

A) 33

Day 9 #7: In 68 - 45, you must borrow a ten to subtract the ones. (True or False?)

False (Ones: 8 >= 5, no borrow needed)

Day 9 #8: 84 - ___ = 61

23 (84 - 61 = 23)

Day 9 #9 (Word Problem): A book has 78 pages. Maya has read 46 pages so far. How many pages does she have left to read?

32 pages (78 - 46 = 32)

Day 9 #10: Which subtraction expression equals 25? A) 68 - 43 B) 79 - 52 C) 87 - 61 D) 49 - 25

A) 68 - 43

Day 9 #11: 99 - 34 - 12 = ___

53 (99 - 34 = 65; 65 - 12 = 53)

Day 9 #12: 64 - 13 has the same answer as 75 - 24. (True or False?)

True (64 - 13 = 51 and 75 - 24 = 51)

Day 9 #13 (Word Problem): The school cafeteria made 96 sandwiches for lunch. 42 were ham and the rest were turkey. How many turkey sandwiches were made?

54 turkey sandwiches (96 - 42 = 54)

Day 9 #14: Find the missing digits A and B: 9A - B5 = 42

A = 7, B = 5 (7 - 5 = 2; 9 - 5 = 4)

Day 9 #15 (Challenge): A toy box had 88 blocks. Liam took out 25 blocks to build a tower. Then, Ava took out 31 blocks to build a bridge. How many blocks remained inside the toy box?

32 blocks (88 - 25 = 63; 63 - 31 = 32)

Day 10 #1: What is 42 - 7? A) 35 B) 36 C) 37 D) 45

A) 35

Day 10 #2: To solve 53 - 28, decompose 5 tens 3 ones into ___ tens and 13 ones.

4 tens (and 13 ones)

Day 10 #3: 61 - 25 = 36. (True or False?)

True

Day 10 #4: Solve vertically, showing your regrouping marks: 74 - 38 = ?

36 (Borrow 1 ten: 14 - 8 = 6; tens: 6 - 3 = 3)

Day 10 #5: 90 - 46 = ___

44

Day 10 #6: What is 85 - 49? A) 46 B) 36 C) 34 D) 44

B) 36

Day 10 #7: 50 - 18 = 42. (True or False?)

False (50 - 18 = 32)

Day 10 #8: 62 - ___ = 27

35 (62 - 27 = 35)

Day 10 #9 (Word Problem): A bakery prepared 72 muffins in the morning. By noon, 45 muffins were sold. How many muffins remained unsold?

27 muffins (72 - 45 = 27)

Day 10 #10: Which problem requires regrouping? A) 78 - 34 B) 59 - 27 C) 63 - 29 D) 86 - 41

C) 63 - 29 (3 < 9, so regrouping is required)

Day 10 #11: Check this subtraction using addition: If 81 - 37 = 44, then 44 + 37 must equal ___.

81

Day 10 #12: When subtracting 72 - 48, a student subtracts 8 - 2 = 6 in the ones place. The student's step is correct. (True or False?)

False (You cannot flip digits to subtract the smaller from larger; 1 ten must be decomposed)

Day 10 #13 (Word Problem): A movie theater has 91 seats. 58 tickets have been reserved. How many empty seats are left in the theater?

33 seats (91 - 58 = 33)

Day 10 #14: Fill in the missing digit : 7 - 28 = 45

_ = 3 (Unbundle 1 ten to get 13 - 8 = 5; tens: 6 - 2 = 4)

Day 10 #15 (Challenge): Lucas had 84 points in a video game. He lost 29 points on Level 2, but earned 18 bonus points on Level 3. How many points does Lucas have now?

73 points (84 - 29 = 55; 55 + 18 = 73)

Day 11 #1: A ribbon is 45 inches long. Clara cuts off 12 inches. How long is the ribbon now? A) 33 inches B) 57 inches C) 32 inches D) 35 inches

A) 33 inches

Day 11 #2: Complete the part-part-whole relationship: Part 1 = 38, Part 2 = 27. Whole = ___.

65 (38 + 27 = 65)

Day 11 #3: The phrase "Jack has 15 more candies than Ben" means you must subtract 15 from Jack's candies to find Ben's candies. (True or False?)

True

Day 11 #4: Oliver scored 28 points in a game. Daniel scored 14 fewer points than Oliver. How many points did Daniel score?

14 points (28 - 14 = 14)

Day 11 #5: A tape diagram shows a whole of 85. One part is 49. The other part is ___.

36 (85 - 49 = 36)

Day 11 #6: Mia has 24 red beads and 36 blue beads. She uses 18 beads to make a bracelet. How many beads does she have left? A) 42 B) 78 C) 48 D) 32

A) 42 (24 + 36 = 60; 60 - 18 = 42)

Day 11 #7: If Box A has 50 pencils and Box B has 35 pencils, Box A has 25 more pencils than Box B. (True or False?)

False (50 - 35 = 15 more pencils)

Day 11 #8: Write the equation for this bar model: [--- x ---][--- 19 ---] = Total: 62 x = 62 - 19 = ___.

43

Day 11 #9 (Word Problem): A pet shelter had 34 kittens. On Friday, 12 kittens were adopted. On Saturday, 9 kittens were adopted. How many kittens are still at the shelter?

13 kittens (34 - 12 = 22; 22 - 9 = 13)

Day 11 #10: Ethan has 45 stickers. He has 16 more stickers than Liam. How many stickers does Liam have? A) 61 B) 31 C) 29 D) 39

C) 29 (45 - 16 = 29)

Day 11 #11: In a garden, there are 27 red roses and 35 yellow roses. After picking 14 roses, there are ___ roses left in the garden.

48 roses (27 + 35 = 62; 62 - 14 = 48)

Day 11 #12: Solving a two-step problem always requires using addition first and subtraction second. (True or False?)

False (Operations depend on problem context and can occur in any order)

Day 11 #13 (Word Problem): A bus left the station with 52 passengers. At the first stop, 18 passengers got off and 9 new passengers got on. How many passengers are on the bus now?

43 passengers (52 - 18 = 34; 34 + 9 = 43)

Day 11 #14 (Word Problem): Store A sold 46 laptops. Store B sold 17 more laptops than Store A. How many laptops did Store A and Store B sell combined?

109 laptops (Store B = 46 + 17 = 63; Combined = 46 + 63 = 109)

Day 11 #15 (Challenge): Caleb, Zoe, and Mason collect seashells. * Caleb has 38 shells. * Zoe has 15 fewer shells than Caleb. * Mason has 24 more shells than Zoe. How many seashells do all three children have altogether?

108 seashells (Caleb = 38; Zoe = 38 - 15 = 23; Mason = 23 + 24 = 47; Total = 38 + 23 + 47 = 108)

Day 12 #1: What is 67 + 28? A) 85 B) 95 C) 96 D) 86

B) 95

Day 12 #2: 93 - 57 = ___

36

Day 12 #3: 48 + 36 = 84. (True or False?)

True

Day 12 #4: Solve vertically: 80 - 34 = ?

46

Day 12 #5: 25 + 38 + 19 = ___

82 (25 + 38 = 63; 63 + 19 = 82)

Day 12 #6: Which difference equals 38? A) 72 - 34 B) 81 - 42 C) 65 - 28 D) 90 - 53

A) 72 - 34

Day 12 #7: When adding 45 + 35, the ones digit of the sum is 0. (True or False?)

True (5 + 5 = 10, ones digit is 0)

Day 12 #8: Complete the equation: 100 - ___ = 63

37

Day 12 #9 (Word Problem): An art class had 65 sheets of construction paper. The students used 38 sheets for an art project. The teacher then brought in 25 new sheets. How many sheets of paper does the class have now?

52 sheets (65 - 38 = 27; 27 + 25 = 52)

Day 12 #10: Find the missing number: ___ - 26 = 47. A) 21 B) 63 C) 73 D) 71

C) 73 (47 + 26 = 73)

Day 12 #11: 56 + 29 = 56 + 30 - ___ = 85.

1

Day 12 #12: 73 - 26 = 47. (True or False?)

True

Day 12 #13 (Word Problem): A farmer picked 44 green apples and 39 red apples. He threw away 15 bruised apples and packed the rest into crates. How many good apples did he pack?

68 good apples (44 + 39 = 83; 83 - 15 = 68)

Day 12 #14 (Challenge): Determine the values of digits X and Y: X2 - 3Y = 28

X = 6, Y = 4 (Borrow 1 ten: 12 - 4 = 8; then tens: 5 - 3 = 2, so original tens was 6)

Day 12 #15 (Challenge): A library received 100 new books. * Grade 1 borrowed 27 books. * Grade 2 borrowed 38 books. * Grade 3 wanted to borrow 40 books. Did the library have enough remaining books for Grade 3? If not, how many more books would they need?

No, the library did not have enough. They needed 5 more books. (Total borrowed = 27 + 38 = 65; Books left = 100 - 65 = 35. Since 35 < 40, they are short by 40 - 35 = 5 books.)