Show:
1
2
3
4
5
100

699-342

357

100

738-397

341

100

749-232

517

100

906-784

122

100

5,000-476

4,524

200

Estimate. Round each number to the greatest place value.

82-17

60

200

Estimate. Round each number to the greatest place value.

591-308

300

200

Estimate. Round each number to the greatest place value.

7,095-1075

6,000

200

Estimate. Round each number to the indicated place value.

9,112-6,225; hundreds

2,900

200

Estimate. Round each number to the indicated place value.

938-576; tens

360

300

The local zoo has 124 mammals and 97 reptiles. How many more mammals does the zoo have than reptiles?

27 mammals

300

The fourth-grade class made $1,024 from their bake sale. The third-grade class made $1,535. How much more did the third-grade class make than the fourth-grade class?

$511

300

Carlita played in the park for 60 minutes on Saturday and 32 minutes on Sunday. How many more minutes did she play on Saturday than on Sunday? Do you need an exact answer or an estimate?

Exact; 28 minutes

300

If Peter studies for 29 minutes on Thursday and 45 minutes on Friday, about how many more minutes will he have studied on Friday than on Thursday? Do you need an exact answer or an estimate?

Estimate; 20 minutes

300

The grocery store sold 277 containers of strawberry yogurt and 242 containers of vanilla yogurt. About how many more containers of strawberry yogurt did they sell than vanilla yogurt? Do you need an exact answer or an estimate?

Estimate; 40 containers

400

Vocabulary: A number close to the exact number

estimate

400

Vocabulary: to rename a number using place value

regroup

400

Vocabulary: two operations that can undo each other, such as addition and subtraction

inverse operations

400

Vocabulary: an operation that tells the difference, when some or all are taken away

subtraction

400

Vocabulary: the answer to a subtraction problem

difference

500

Vocabulary: a number sentence in which one quantity is taken away from another quantity

subtraction sentence

500

5,000 - 3,029 = 

1,971

500

Vocabulary: A number close to the exact number

estimate

500

Vocabulary: to rename a number using place value

regroup

500

Vocabulary: the answer to an addition sentence

sum