Unit 1: Whole Numbers and Basic Operations

(a) Write 8,742 in word form:
- Answer: Eight Thousand Seven Hundred Forty-Two
(b) Write "nine thousand sixty-five" in standard form:
- Answer: 9,065
(c) Write 5,208 in expanded form:
- Answer: 5,000 + 200 + 8
(d) What is the value of the digit 7 in 47,826?:
- The value of 7 is 700 as it is in the hundreds place.
(e) Write the number that has: 3 thousands, 0 hundreds, 5 tens, and 9 ones:
- Answer: 3,059
(f) Which is greater: 456 or 465?:
- Answer: 465 is greater than 456.
(g) Arrange in ascending order: 234, 432, 243, 324:
- Answer: 234, 243, 324, 432
(h) Round 3,789 to the nearest ten:
- Answer: 3,790
(i) Round 56,789 to the nearest thousand:
- Answer: 57,000
(j) Write 1,000,000 in word form:
- Answer: One Million

(a) Write 12.345,678 in expanded form:
- Answer: 10,000 + 2,000 + 300 + 40 + 5 + 0.6 + 0.07 + 0.008
(b) What is the difference between the place value of 5 in 45,678 and 54,678?:
- The place value of 5 in 45,678 is 5,000 and in 54,678 is 500.
- Difference: 5,000 - 500 = 4,500
(c) Round 99,999 to the nearest hundred:
- Answer: 100,000
(d) Which number is exactly halfway between 1,000 and 2,000?:
- Answer: 1,500
(e) If you round a number to the nearest hundred and get 3,400, what could the original number be? Give three possibilities:
- Possible original numbers: 3,350; 3,351; 3,400 to 3,449.
(f) Write "twenty-three million four hundred fifty-six thousand seven hundred eighty-nine" in standard form:
- Answer: 23,456,789
(g) Arrange in descending order: 9,999; 10,001; 9,909; 10,100:
- Answer: 10,100; 10,001; 9,999; 9,909
(h) What is the smallest 5-digit number you can make using digits 4, 0, 3, 7, 2 without repetition?:
- Answer: 20,347
(i) Round 444,444 to the nearest ten thousand:
- Answer: 440,000
(j) A number rounded to the nearest thousand is 8,000. The sum of its digits is 23. What could the number be?:
- Possible numbers that meet these criteria could include: 7,999; 8,001; 8,999.