Problem
|
Strategy
|
Answer
|
13x5=65
|
10x5=50 3x5=15 50+15=65
|
65
|
19x6=114
|
10x6=60 9x6=54 60+54=114
|
114
|
15x7=105
|
10x7=70 5x7=40 40+70=105
|
105
|
18x6=128
|
10x8=80 8x6=48 80+48=128
|
128
|
14x9=126
|
10x9= 90 4x9=36 90+48=126
|
126
|
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