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75%乘1.375加5.625乘75%加0.75(简便运算)

=0.75*(1.375 5.625 1) =0.75*8 =6

(1)(13+216?512)×12=13×12+136×12-512×12,=4+26-5,=25;(2)[47?(18.75?1÷815)×2625]÷0.46=[47-(18.75-158)×5625]÷0.46,=[47-(18.75×5625-1.875×5625)]÷0.46,=[47-(42-4.2)]÷0.46,=[47-37.8]÷0.46,=9.2÷0.46,=20;(3)75%×1.37...

八分之五和百分之62.5都是0.625,这个式子中就有了三个0.625,把0.625提出来,把二分之一变成0.5,即=0.625*(0.5+1+0.5)=0.625*2=1.25

1/4×5.6+3.6×25%+4/5×0.25 =0.25×5.6+3.6×0.25+.08×0.25 =0.25(5.6+3.6+0.8) =0.25×10 =2.5(简便计算) 0.75+5.625×3/4+75%×...

5/8x92+7x0.625+62.5% =0.625x92+7x0.625+0.625 =0.625x(92+7+1) =0.625x100 =62.5

5/8×1/2×5/8+0.625x50% =0.5x(25/64+5/8) =0.5x(65/64) =65/128 =128分之65

75% = 0.75 75%x1.625十75%x5.375 + 0.75 =(0.75)*(1.625 + 5.375 +1) = 0.75 * 8 =6

5.32减0.375加0.68减0.625 =5.32+0.68+0.375+0.625 =6+1 =7 1.5乘[0.02除(2.1减2.09)] =1.5×[0.02÷0.01) =1.5×2 =3 3.4除[(1.25加0.45)] =3.4÷(1.7) =2 0.25乘(4.8减7.5除3) =0.25×(4.8-2.5) =0.25×2.3 =0.25×(2+0.3) =0.5+0.075 =0.575

3/8+2.25+3/4+5.625 =0.375+5.625+2.25+0.75 =6+3 =9 谢谢,请采纳

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