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(3/5×3.625+4.375×0.6)×1.25简便运算

原式 =0.6×(3.625+4.375)×1.25 =0.6×8×1.25 =0.6×10 =6

(1)3.625+2 1 13 +4 12 13 +0.375,=(3.625+0.375)+(2 1 13 +4 12 13 ),=4+7,=11;(2) 1 4 ×7 5 7 +0.25×3 2 7 ,=0.25×7 5 7 +0.25×3 2 7 ,=0.25×(7 5 7 +3 2 7 ),=0.25×(10+1),=2.5+0.25,=2.75.

=(4.375/6.25+4.375✘79)/4.75 =(0.7+345.625)/4.75 =72.9

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