What number goes in the blank to make the sentence true?
87 + 97 = ____ - 3
What is 187
100
What number belongs in the blank?
Round each number to the nearest hundred to estimate the sum.
520 + 479 = ?
What is 1,000
200
Add Mentally
36 + 12
What is 48
200
Subtract mentally
92 - 52 = _____
What is 40
200
Round 68 to the nearest ten
What is 70
200
What number goes in the blank to make the sentence true?
72 - 26 = ____ + 4
What is 42
200
What number belongs in the blank?
Round each number to the nearest hundred to estimate the sum.
725 + 645 = ? The estimated sum is _______.
What is 1,300
300
Add Mentally
27 + 99
What is 126
300
Subtract mentally
82 - 14 = _____
What is 68
300
Round 3,485 to the nearest thousand
What is 3,000
300
Which is the best estimate for the sum of 685 + 599?
A. 500 + 500 = 1,000
B. 500 + 600 = 1,100
C. 700 + 500 = 1,200
D. 700 + 600 = 1,300
300
What number belongs in the blank?
Round each number to the nearest hundred to estimate the difference.
715 - 589 = ? The estimated difference is _______.
What is 100
400
Add mentally
49 + 56 = _____
What is 105
400
Subtract mentally
64 - 19 = _____
What is 45
400
Round 4,399 to the nearest hundred
What is 4,400
400
A coach has $250. He wants to buy some shirts that cost $122 and some shorts that cost $159. About how much more money does he still need to buy the shirts and shorts?
What is $30
400
What number belongs in the blank?
Round each number to the nearest hundred to estimate the difference.
541 - 135 = ? The estimated difference is _______.
What is 400
500
Add Mentally
68 + 23
What is 91
500
Subtract mentally
Subtract 19 from 49.
What is 30
500
Round 41,908 to the nearest hundred
What is 41,900
500
There are 844 crayons in the drawer. Nancy placed 561 more crayons in the drawer. ABOUT how many crayons are now in the drawer?
What is 1400 crayons
500
Mr. Hathaway has $2,000 to buy furniture. Use rounding to estimate how much all
the items cost.
Does Mr. Hathaway have enough money to buy all the items?
Sofa: $569
Coffee table: $355
Rug: $149
Dining table set: $999
Mr. Hathaway __________ have enough money to buy all the items.
Use does or does not as your answer