Base 10
Add It!
Subtract It!
Expanded Form
Regrouping
100

Show 158 with base 10 blocks.

O  l l l l l  . . . . . . . .

100

Mary has saved $231. Julie has saved $168. How much money have they saved all together? Show your work.

$399

100

Wyatt gets 187 pieces of candy on Halloween. He eats 124 of them. How many does he have left? Show your work.

63

100

Write 159 in expanded form.

158 = 100 + 50 + 9

100

Will I have to regroup the tens to solve this problem?

742 - 423 = ?

Yes. I cannot take 3 away from 2, so I have to regroup the tens to get more ones.

200

Show 229 with base 10 blocks.

O O  l l  . . . . . . . . .

200

There are 235 people at the zoo today. There were 301 at the zoo yesterday. What is the total number of people who have been at the zoo yesterday and today? Show your work.

536 people

200

One day, Jude is walking through the forest. He finds 254 squirrels in a tree. He shouts and scares off 163 of them. How many squirrels are left in the tree? Show your work.

91 squirrels

200

Write 203 in expanded form.

203 = 200 + 0 + 3

200

Will I have to regroup the 10s to solve this problem?

325 - 212 = ?

No. I have enough ones.

300

Show 345 with base 10 blocks. 

O O O  l l l l  . . . . .

300

Mrs. Tupper sold 325 suckers this morning. Mrs. Rauch sold 288 more during lunch. How many suckers have been sold? Show your work.

613 suckers

300

Iam finds $503 on the ground. Oliver steals $315. How much money does Iam have left? Show your work.

$188

300

Write 493 in expanded form.

493 = 400 + 90 + 3

300

Will I have to regroup the hundreds to solve this problem?

265 - 174 = ?

Yes. I cannot take 7 away from 6, so I have to regroup 100 to get more tens.

400

Show 490 with base 10 blocks.

O O O O  l l l l l l l l l

400

There are 458 book in our school library. A local library donates 230 more books. How many do we have now? Show your work.

688 books

400

If Madeline has 248 crayons and Helen has 457, how many more crayons does Helen have than Madeline? Show your work.

209 more crayons

400

Write 617 in expanded form.

617 = 600 + 10 + 7

400

Will I have to regroup the hundreds to solve this problem?

315 - 223 = ?

Yes. I cannot take 2 away from 1, so I will have to regroup 100 to get more 10s.

500

Show 756 with base 10 blocks.

O O O O O O O  l l l l l  . . . . . .

500

The Pacers score 172 points in the first half and 365 points in the second half. How many points do they have at the end of the game? Show your work.

537 points

500

Kynlee and Ember go to the mall. Kynlee has $298. Ember has $425. How many more dollars does Ember have than Kynlee? Show your work.

$127 more

500

Write this number in standard form.

700 + 50 + 4

754

500

Will I have to regroup the 100s or the 10s to solve this problem?

439 - 183 = ?

The 100s. I cannot take 8 away from 3, so I need more tens.

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