Problem
|
Strategy
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Answer.
|
13 x 5=
|
10 x 5=50
5 x 5=25
50+25=75
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=75
|
19 x 6=
|
10 x 6=60
9 x 6=54
60+54=114
|
=114
|
15 x 7=
|
10 x 7=70
5 x 7=35
70+35=105
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=105
|
18 x 6=
|
10 x 6=60
8 x 6=48
60+48=108
|
=108
|
14 x 9=
|
10 x 9=90
4 x 9=36
90+36=126
|
=126
|
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