Question

5.2x32%+2.4x0.64有简便方法。用简便方法？

Answer 1

5.2x32%+2.4x0.64
=5.2x0.32+2.4x0.64
=2.6×2x0.32+2.4x0.64
=2.6×0.64+2.4×0.64
=（2.6+2.4）×0.64
=5×0.64
=3.2
或
5.2x32%+2.4x0.64
=5.2x0.32+2.4x2×0.32
=（5.2+2.4x2）×0.32
=（5.2+4.8）×0.32
=10×0.32
=3.2

Answer 2

解:此题可以将32%化为小数0.32，将0.64运用乘法分配律化为0.32x2同2.4连乘，那么可以提取0.32，然后按四则运算法则进行计算。计算过程
5.2x32%+2.4ⅹ0.64
=5.2ⅹ0.32+2.4ⅹ0.32ⅹ2
=0.32ⅹ(5.2+4.8)
=0.32ⅹ10
=3.2。

Answer 3

=5.2×0.32+2.4×0.64
=2.6×2×0.32+2.4×0.64
=2.6×0.64+2.4×0.64
=0.64×(2.6+2.4)
=0.64×5
=3.2