1.
Find the sum.
93 + 178 = ___
A.
271
B.
171
C.
161
D.
1,081
Hint
2.
Find the sum.
278 + 187 = ___
A.
355
B.
365
C.
455
D.
465
Hint
3.
Find the sum.
A.
591
B.
691
C.
601
D.
501
Hint
4.
Find the sum.
A.
$490
B.
$590
C.
$400
D.
$500
Hint
5.
Why is it a good idea to check answers for reasonableness?
A.
Many careless mistakes can be caught this way.
B.
Any mistake can be caught by using estimation to check your answers.
C.
Using estimation to check your answers gives exact results.
D.
Checking for reasonableness uses the Identity Property.
Hint