Question

3点82乘零点四五怎么用简便方法计算

Answer 1

3点82乘零点四五怎么用简便方法计算

原式
=3.82x0.45
=(1.91x2)x0.45
=1.91x(2x0.45)
=1.91x0.9
=1.91x1-1.91x0.1
=1.91-0.191
=1.719
供参考。

二点5×38乘零点四用简便方法计算

2.5×38×0.4
=（2.5×0.4）×38
=1×38
=38

58点四除以零点四除以25怎么用简便方法算

58.4÷0.4÷25
＝58.4÷（0.4×25）
＝58.4÷10
＝5.84

7.84减1.84除以零点四用简便方法怎么计算

7.84-1.84÷0.4
=7.84-4.6
=3.24

0.77乘零点四的简便方法

0.77×0.4
=(0.7+0.07)×0.4
=0.7×0.4+0.07×0.4
=0.28+0.028
=0.308

780除五除零点四用简便计算

=780/（5*0.4）=780/2=390。

4.85×5分之2+5点一五×于零点四用简便方法计算

原式=4.85×0.4+5.15×0.4
=0.4×(4.85+5.15)
=0.4×10
=4

0.72除以25再除以零点四的简便方法计算

0.72除以25再除以零点四
=0.72÷(25x0.4)
=0.72÷10
=0.072

8/21×2点5×5/12乘零点四简便计算

8/21×2点5×5/12乘零点四简便计算
8/21×2点5×5/12乘零点四
=8/21*5/12*(2.5*0.4)
=10/63*1
=10/63

34点六乘四点三加346乘零点四七加34点六简便计算

34.6×4.3+346×0.47+34.6
=34.6×4.3+34.6×4.7+34.6
=34.6×（4.3+4.7+1）
=34.6×10
=346