2.02×8.5和56×1.25的简便运算

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2.02×8.5和56×1.25的简便运算

2.02×8.5和56×1.25的简便运算
2.02×8.5和56×1.25的简便运算

2.02×8.5和56×1.25的简便运算

2.02×8.5=(2+0.02)×8.5

2.02x8.5=(2+0.02)x8.5=2x8.5+0.02x8.5=17+0.17=17.17
56x1.25=8x1.25x7=10x7=70

1 2×8.5+0.02×8.5

2.02×8.5=(2+0.02)×8.5
=2×8.5+0.02×8.5
=17+0.17
=17.17
56×1.25
=7×8×1.25
=7×10
=70

2.02*8.5=(2+0.02)*8.5=2*8.5+0.02*8.5=17+0.17=17.17
56*1.25=7*8*1.25=7*10=70