27.9+3.6*2.5/0.4
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27.9+3.6*2.5/0.427.9+3.6*2.5/0.427.9+3.6*2.5/0.427.9+3.6*2.5/0.4=3.1×9+9×2.5=（3.1+2.5）×9=5.6×（10-1）=
27.9+3.6*2.5/0.4
27.9+3.6*2.5/0.4
27.9+3.6*2.5/0.4
27.9+3.6*2.5/0.4
=3.1×9+9×2.5
=（3.1+2.5）×9
=5.6×（10-1）
=56-5.6
=50.4
=27.9+9/0.4
=27.9+22.5
=50.4
27.9+3.6*2.5/0.4
27.9+3.6×2.5÷0.48=简便方法
(2.5-2.5*0.6)/0.4
6.71-(3.7-0.29) 6.4+3.6/0.4 (8.14-3.75)/2.56.71-(3.7-0.29) 6.4+3.6/0.4 (8.14-3.75)/2.5/4 1.25*8.8这几道题怎么简便运算
用简便方法计算 3.6+0.4-3.6+0.4用简便方法计算 3.6+0.4-3.6+0.4
3.6/0.4-1.2×5
0.4*+0.5*=3.6
3.6/15+2.5*1.4
3.6X4-2.5
3.6乘10.2、（4-0.4）乘2.5、4.8-4.8乘0.5的简便运算怎么算?急
2.5*3.6+3.6*7.5用简便计算
3.6+7.6除以0.4-3.
计算3.6/0.4-12.5*5
2.5*0.4+0.21*3
2.5:0.4化简成最简比
0.4×2.5×32×1.25
2.5×4.6×0.4×0.3
3.6÷0.4-1.2×5 90÷【3.6-1.8】 【31.6-11.7】÷2.5÷0.4 3.4×7.8÷3.9 5.23×4+4.77÷0.25 都怎么用简都怎么用简便方法计算?