1
699-342
357
738-397
341
749-232
517
906-784
122
902-367
535
Estimate. Round each number to the greatest place value.
82-17
60
Estimate. Round each number to the greatest place value.
591-308
300
Estimate. Round each number to the greatest place value.
795-175
600
Estimate. Round each number to the indicated place value.
912-625; hundreds
300
Estimate. Round each number to the indicated place value.
938-576; tens
360
The local zoo has 124 mammals and 97 reptiles. How many more mammals does the zoo have than reptiles?
27 mammals
The fourth-grade class made $124 from their bake sale. The third-grade class made $155. How much more did the third-grade class make than the fourth-grade class?
$31
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
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
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
Vocabulary: A number close to the exact number
estimate
Vocabulary: to rename a number using place value
regroup
Vocabulary: two operations that can undo each other, such as addition and subtraction
inverse operations
Vocabulary: an operation that tells the difference, when some or all are taken away
subtraction
Vocabulary: the answer to a subtraction problem
difference
Vocabulary: a number sentence in which one quantity is taken away from another quantity
subtraction sentence
Vocabulary: another word for quantity
number
Vocabulary: A number close to the exact number
estimate
Vocabulary: to rename a number using place value
regroup
Vocabulary: the answer to an addition sentence
sum