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2.1*12.5*4.8简便算

2.1×(12.5×4)×1.2=2.1×60=126

2.1乘以12.5乘以4.8 =2.1×12.5×(8×0.6) =(2.1×0.6)×(12.5×8) =1.26×100 =126

=1.2×(4.8+5) =1.2×9.8 =1.2×(10-0.2) =12-0.24 =11.76 确定

1.2+8.8×12.5 =1.2+8x12.5+0.8x12.5 =1.2+100+10 =111.2

12.5x1.2-12.5 =12.5x(1.2-1) =12.5x0.2 =0.25

原式=5/12✖️6=5/2

1.25x3+12.5x1.2+12.5x6.5怎么简便计算 =12.5x0.3+12.5x1.2+12.5x6.5 =12.5x(0.3+1.2+6.5) =12.5x8 =100

555785852

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