Question

用简便方法计算。。

2.4×99 0.888×0.6+0.111×3.2

Answer 1

2.4×99
=2.4×（100-1）
=2.4×100-2.4×1
=240-2.4
=237.6

0.888×0.6+0.111×3.2
=（0.111×8）×0.6+0.111×3.2
=0.111×（8×0.6）+0.111×3.2
=0.111×4.8+0.111×3.2
=0.111×（4.8+3.2）
=0.111×8
=0.888

Answer 2

2.4×99
=2.4x(100-1)
=2.4x100-2.4x1
=240-2.4
=237.6

0.888×0.6+0.111×3.2

=0.111x4.8+0.111x3.2
=0.111x(4.8+3.2)
=0.111x8
=0.888

Answer 3

2.4×99=2.4×(100-1)=240-2.4=237.6

0.888×0.6+0.111×3.2=0.888×0.6+0.111×8×0.4=0.888×(0.6+0.4)=0.888