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用简便方法计算下面各题 4.8×0.25 0.78×98 0.5×

1、4.8×0.25 =(4+0.8)×0.25 =4×0.25+0.8×0.25 =1+0.2 =1.2

4.8×0·25==4.8*1/4=1.2 0.78×98=0.78*(100-2)=78-1.56=76.44 0.5×2.33×8=2.33*4=9.32 1·5×105=1.5*(100+5)=150+7.5=157.5 0·3×2·5×0·4=0.3*1=0.3 1·2×2·5+0.8×2·5=2.5*(1.2+0.8)=2.5*2=5

0.78×0.25×456=88.92 ~回答完毕~ ~\(^o^)/~祝学习进步~~~

方法1: 0.78乘98 =(0.8-0.02)乘98 =0.8乘98-0.02乘98 =78.4-1.96 =76.44 方法2: 0.78乘98 =0.78乘(100-2) =0.78乘100-0.78乘2 =78-1.56 =76.44 1、乘法是指将相同的数加起来的快捷方式。其运算结果称为积。从哲学角度解析,乘法是加法的量...

0.78×98=0.78×(100-2)=0.78×100-0.78×2=78-1.56=76.44 简便计算是一种特殊的计算,它运用了运算定律与数字的基本性质,从而使计算简便,使一个很复杂的式子变得很容易计算出得数。 性质: 1.减法1:a-b-c=a-(b+c) 2.减法2:a-b-c=a-c-b 3.除法1...

4.8x0.25 =1.2×(4×0.25) =1.2×1 =1.2 0.78x98 =0.78×(100-1) =0.78×100-0.78 =78-0.78 =77.22 0.5x2.33x8 =(0.5×8)×2.33 =4×2.33 =9.32 1.5x105 =1.5×(100+5) =1.5×100+1.5×5 =150+7.5 =157.5 0.3x2.5x0.4 =0.3×(2.5×0.4) =0.3×1 =0.3...

1.5×105=1.5×(100+5)=1.5×100+1.5×5=150+7.5=157.5 0.3×2.5×0.4=0.3×(2.5×0.4)=0.3×1=0.3 4.8×0.25=1.2×4×0.25=1.2×1=1.2 0.78×98=0.78×(100-2)=0.78×100-0.78×2=78-1.56=76.44 0.5×2.33×8=(0.5×8)×2.33=4×2.33=9.32 1.2×2.5+0.8×2.5=2....

简便计算: 0.78×98 =0.78×(100-2) =0.78×100-0.78×2 =78-1.56 =76.44

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