Addition
Subtraction
Compare distance
Rounding & Estimating
Challenge
100

At a school bake sale, the sixth-grade table raised $328. The eighth-grade table raised $279. Each table worked 30 minutes during the sale. How much money did both tables raise together?

607

100

What is the difference between the two scores on the scoreboard? 634 -276

348

100

Lena has 2 cousins. Cousin A lives 254 miles away. Cousin B lives 139 miles away. How many miles closer is Cousin B?

115

100

Maya is completing two puzzles. One puzzle has 147 pieces. The other has 164 pieces. Rounded to the nearest ten, about how many pieces will Maya put together?

310

200

A bookstore sold 712 bookmarks on Friday. On Saturday the store sold 186 bookmarks. How many bookmarks were sold over the two days?

898

200

A park planned to install 450 new benches. They instead installed 312 benches and 90 planters. How many fewer benches did the park install than planned?

68

200

Marco’s aunt lives 312 miles away. His uncle lives 198 miles away. How many miles closer is the uncle?

114

200

A small town’s population was recorded in these years: YEAR 1998: 681 

YEAR 2018: 927 

To the nearest hundred, about how many more people lived in the town in 2018 than in 1998?

About 200 more people

300

On Thursday, 312 people attended a school concert. On Friday, 389 people attended the same concert. How many people attended in all?

701

300

A package contains 412 beads. Lauren needs 186 beads to make necklaces and her sister needs 195 beads to make bracelets. If they buy one package, will they have enough beads? Explain all your mathematical thinking.

Total needed: 186 + 195 = 381

Beads in one package: 412

Compare: 412 - 381 = 31


300

A delivery driver traveled 427 miles on Monday and 186 miles on Tuesday. How many miles did the driver travel in total?

427+186=613 miles.

300

Ben has two model kits. One kit has 138 pieces and the other has 162 pieces. Rounded to the nearest ten, about how many pieces will Ben put together?

Answer: Round 138→140 and 162→160 

Total ≈ 140+160=300140+160=300

400

Sam drove 185 miles on Monday, 92 miles on Tuesday, and 174 miles on Wednesday. How many miles did Sam drive in total?

451

400

Mr. Dillard spent 346 on gasoline last month. Mrs. Marks spent 279. Mr. Chu spent 512. How much more did Mr. Chu spend on gasoline than Mr. Dillard? Show all your mathematical thinking.

  • Mr. Chu: 512
  • Mr. Dillard: 346

Subtract: 512−346= 166

400

Nina had 275 stickers. She gave 139 stickers to friends and then bought 48 more. How many stickers does she have now?

Work: Used 139,

 so remaining 275−139=136

Then 136+48=184
Answer: 184 stickers.

400

Priya is assembling two puzzles: one has 121 pieces and the other has 148 pieces. Rounded to the nearest ten, about how many pieces will she put together?

Answer: Round 121→120 and 148→150 

Total ≈ 120+150=270

500

Sean finds 627 + 389 using place value. He breaks apart each addend by using expanded form, then adds the hundreds, tens, and ones. Show how Sean found the sum. Then find the sum. Show all your mathematical thinking.

Step 1 — Expanded form (place‑value break apart)

  • 627 = 600 + 20 + 7
  • 389 = 300 + 80 + 9

Final answer: 627 + 389 = 1016

500

Mario has 328 tokens. He uses 197 of them to download a game to his tablet and 22 of them to add a character to another game. How many tokens does he have left? Show all your mathematical thinking.

Start with total tokens: 328

Total used: 197 + 22

  • Add: 197 + 22 = 219

Subtract used from total: 328 - 219

  • Subtract hundreds/tens/ones: 328 - 200 = 128
  • Then 128 - 19 = 109


500

A school sold 635 raffle tickets. Another school sold 248 raffle tickets. How many more tickets did the first school sell than the second?

635−248=387 more tickets.

500

Carlos bought two LEGO packs with 132 and 167 pieces. Rounded to the nearest ten, about how many pieces did he buy?

Answer: Round 132→130 and 167→170

. Total ≈ 130+170=300

500

A librarian receives two boxes of books for the library. The first box has 149 books. The second box has 63 fewer books than the first box. What is the total number of books the librarian receives? Show all your mathematical thinking.

Step 1 — Find how many books are in the second box. First box: 149 Second box is 63 fewer, 

so: 149 - 63 = 86

Step 2 — Add the two boxes to get the total. 149 + 86 = 235

Answer: The librarian receives 235 books in total.

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