Subtract Mentally
Make 10 or 100 to subtract mentally.
172-99
73
Estimate. Round each number to the greatest place value.
34-7
30-10=20
Find the difference.
857-427
430
765-456=
309
503-78
425
522-425=
97
Estimate. Round each number to the greatest place value.
388-311=
400-300=100
$7,246-2,225=
5,021
888-111
777
7,000-678
6,322
Make a 10 or 100 to subtract.
721-129
592
Round the number to the indicated place value.
$78-$15; tens
80-20=60
Eva saved $129 in May and $182 in June. How much more money did she save in June than in May?
$53
8,954-1,876=
7,078
8,000-988
8,012
Ms. Talker walked Sancho for 29 minutes on Friday and 47 minutes on Saturday. To the nearest ten, how many more minutes did she walk Sancho on Saturday than Friday?
50-30=20
20 minutes
Elli has 388 milk bones. She breaks into her treat box and eats some. Elli now has 296 milk bones left. How many milk bones did Elli eat?
92 bones
Find the unknown dollar amount.
$7,964-$3,489=
$4,475
Ms. Ramos solved the subtraction problem. Was she correct?
5,000-69= 4,940
No, the answer is 4,931
Ms. Chilton is making her famous salsa. She used 473 tomatoes and 137 cloves of garlic in her salsa. To the nearest hundred, about how many more tomatoes did she use then cloves of garlic in her salsa?
500-100=300
300 tomatoes.
Elli is back at it again. Elli is chewing up toys. She started with 34 toys. She chewed up 7 toys before Ms.Livingston put a stop to her. How many toys does Elli have left?
27 toys
True or False
When you are regrouping, you can borrow from the thousands place and regroup it into the ones place. It is ok to skip the other place values.
5,000-69=
FALSE. You need to regroup into the place value next door.