Question

0.4x0.5x0.25×0.2用简便方法计算

Answer 1

0.4x0.5x0.25×0.2用简便方法计算

0.4×0.5×0.25×0.2
=（0.4×0.25）×（0.5×0.2）
=0.1×0.1
=0.01

1.84x0.25x0.4用简便方法计算

1.84×0.25×0.4
=1.84×（0.25×0.4）
=1.84×0.1
=0.184
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用简便方法计算0.25x(4 0.4)

0.25x(4+0.4)
=0.25×4+0.25×0.4
=1+0.1
=1.1

用简便方法计算。0.25x3.37x0.4

0.25×0.4×3.37
=0.1×3.37
=0.337

用简便方法计算0.2x36x0.25

0.2x36x0.25
=0.2x（9x4）x0.25
=（0.2x9）x（4x0.25）
=1.8x1
=1.8

用简便方法计算(3+0.2)x0.25

（3+0.2）×0.25
＝3.2×0.25
＝（4×0.25）×0.8
＝1×0.8
＝0.8

用简便方法计算3.74x0.44x0.5

0.54x2.5x0.4
=0.54x（2.5x0.4）
=0.54

用简便方法计算。 2.5x（40+4+0.4） = 8.7x7.5+87.4x0.25 =

2.5*40+2.5*4+2.5*0.4=100+10+1=111
8.7*7.5+8.74*2.5=8.7*7.5+8.7*2.5+0.04*2.5=8.7*(7.5+2.5)+0.04*2.5=87+0.1=87.1

用简便方法计算0.2-0.25×6 和2.4×10.1-0.24x1

用简便方法计算0.2-0.25×6 和2.4×10.1-0.24x1
0.2-0.25×6 =0.2-0.25*2*3=0.2-0.5*3=0.2-1.5=-1.3
2.4×10.1-0.24x1=2.4*10.1-2.4-10=2.4*（10.1-10）=2.4*0.1=0.24

用简便方法计算0.34x0.5x0.8

用简便方法计算
0.34x0.5x0.8
=0.34×（0.5×0.8）
=0.34×0.4
=0.136