1.
Estimate. Round to the nearest ten.
A.
90 − 20 = 70
B.
90 − 30 = 60
C.
100 − 20 = 80
D.
100 − 30 = 70
Hint
2.
Estimate. Round to the nearest hundred.
A.
200 − 0 = 200
B.
150 − 50 = 100
C.
180 − 60 = 120
D.
200 − 100 = 100
Hint
3.
Estimate. Round to the nearest hundred.
A.
400 − 100 = 300
B.
480 − 130 = 350
C.
480 − 130 = 350
D.
500 − 100 = 400
Hint
4.
Estimate. Round to the nearest ten or use compatible numbers.
62 − 38 = ___
A.
70 − 30 = 40
B.
60 − 30 = 30
C.
60 − 40 = 20
D.
70 − 40 = 30
Hint
5.
Estimate. Round to the nearest hundred.
425 − 298 = ___
A.
400 − 300 = 100
B.
400 − 200 = 200
C.
500 − 300 = 200
D.
430 − 300 = 130
Hint