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Try It Out -- Chapter 4, Lesson 5
Numeric Response
Use mental math.
1.
40 – 10 =
____.
2.
55 – 19 =
____.
3.
85 – 29 =
____.
4.
33 – 19 =
____.
5.
48 – 18 =
____.
6.
82 – 49 =
____.
7.
61 – 48 =
____.
8.
73 – 17 =
____.
9.
Diane is 18 years old. Her aunt is 31 years old. How much older is Diane’s aunt than Diane?
10.
James rides 28 kms on his bicycle; John rides 19 kms on his bicycle. How much further did James ride than John?