Category 1: Rounding & Place Value
100: Which of the following numbers has been rounded correctly to the nearest ten?
A. 534 → 530 B. 472 → 500 C. 829 → 820 D. 383 → 390
A
100: Khadija made 248 bookmarks last week and 259 this week. How many in all?
Answer: 507 bookmarks ✅
100: Kaleb’s book has 823 pages. He has read 492. How many are left?
Answer: B. 331 pages ✅
100: The cafeteria gets 533 apples and 269 oranges. Students eat 291 pieces. How many are left?
Answer: B. 511 pieces ✅
100: Which rounding choice is correct?
Answer: 534 → 530 ✅
200: What is nine thousand, two hundred seventy-three written in standard and expanded form?
Answer: 9,273 = 9,000 + 200 + 70 + 3
200: Fred is solving 178 + 429 using partial sums. To find the sum of the tens, which numbers would he add?
Answer: C. 80 + 90 ✅
200: Solve using the bar model:
481 + ___ = 948 and 948 – ___ = 481.
Answer: 467 ✅
200: Emma saved $752. Betty saved $239 less. How much did Betty save?
Answer: $513 ✅
200: Write 9273 in standard and expanded form.
Answer: 9,273 = 9,000 + 200 + 70 + 3 ✅
300: Amira raises $1,383 for a school fundraiser. She says that amount is about $1,380. Which best describes her estimate?
Answer: B. She rounded to the nearest ten ✅
300: Mike jumps rope 236, then 154, then 301 times. Which expressions show the total?
Answer: B. 154 + 236 + 301 and C. 236 + 154 + 301 ✅
300: Which equations are true?
A. 211-199= 210-200
B.381-299=380-300
C.794-283=800-289
D.822-109=813-100
Answer: All of them (A, B, C, D) ✅
300: A clerk has an odd number of items to put in two cases. Which arrangements are possible?
Answer: Odd + Even (Yes) ✅
Odd + Odd (No)
Even + Even (No)
300: Compare: 381 − 299 = 380 − 300. True or false?
Answer: True ✅
400: Jessica rounded two numbers to the nearest hundred, then subtracted and got 400. Which expression could she have started with?
Answer: A. 546 – 174 and C. 845 – 379 ✅
400: Pat has 481 baseball cards and 449 football cards. How many cards in all?
Answer: 930 cards ✅
400: Decompose to solve: 958 − 304 = ?
958 − 300 = 658 → 658 − 4 = 654
Answer: 654 ✅
400: Kaleb’s reading: 823 − 492 = ?
Answer: 331 pages ✅
400: Which subtraction problem could give about 400 when rounded?
Answer: 845 − 379 ✅
500: Randy adds 574 + 421 by changing it to 580 + 421 and then adding 6 to the sum. Do you agree?
Answer: ❌ No. He added 6 twice (once to 574 and again at the end).
500: Nasser has 904 bricks. He used 477 and found 213 more. How many left?
Answer: 640 bricks ✅
500: Aisha picks 406 blackberries and uses 275 for jam. How many left?
Answer: 131 blackberries ✅
500: Nasser has 904 bricks, uses 477, then finds 213. How many left?
Answer: 640 bricks ✅
500: Explain Randy’s adding strategy (574 + 421). Is it correct?
Answer: ❌ No. He added 6 twice.