Question

0.42×0.25+0.08÷4的简便方法？

Answer 1

0.42×0.25+0.08÷4=0.42×1/4+0.08×1/4=(0.42+0.08)×1/4=0.5×1/4=1/2x1/4=1/8
（0.4+0.02）*0.25+0.08÷4=0.1+0.005+0.02=0.125
原式=0.42X1/4+0.08X1/4=1/4X(0.42+0.08)=1/4X0.5=1/8=0.125

Answer 2

0.25是四分之一 除以四就是乘以四分之一 所以
=0.42*0.25+0.08*0.25
=(0.42+0.08)*0.25
=0.5*0.25
=0.125

Answer 3

0.42*0.25+0.08/4

运用乘法分配律可简便。

=0.125

Answer 4

 18×0.01= 2.5-2.5÷5= 0÷4.61= 0.03×2.3= 1.25×0.8= 0.42÷0.7= 1.5÷5= 5.1÷0.3= 2.3×0.4= 5.6+5.4= 0.25×4= 6.36－2.6= 2、用竖式计算 0.37×2.4＝ 1.55÷3.8≈ （保留一位小数） 3、递等式计算，能简便的用简便方法计算。 5.5×8.2＋1.8×5.5 0.25×0.89×4