Question

2.4*2.1*0.3怎样简便计算的+五年级？

2.4x2.1x0.3简便运算

Answer 1

2.4*2.1*0.3怎样简便计算的+五年级？
2.4*2.1*0.3
=2.4*（2.1*0.3）
=2.4*0.63
=1.512

Answer 2

回答：
2.4×2.1×0.3
=2.4×0.3×2.1
=0.72×（2+0.1）
=0.72×2+0.72×0.1
=1.44+0.072
=1.512
运用了乘法分配律

Answer 3

计算如下：
2.4*2.1*0.3
=2.4*0.3*2.1
=0.72*(2+0.1)
=0.72*2+0.72*0.1
=1.44+0.072
=1.512

Answer 4

2.4×2.1×0.3
=2.1×0.8×3×0.3
=1.68×0.9
=1.68×（1-0.1）
=1.68-0.168
=1.512