Question

二点五乘四点八有几种简便方法计算

Answer 1

2.5 × 4.8 = 2.5 × (4 × 1.2) = 2.5 × 4 × 1.2 = 12

2.5是一个相对特殊的数字,乘2得5,乘4得10.根据程式的实际数值进行相应分解即可.

Answer 2

法1
2.5×4.8
=2.5×4×1.2
=10×1.2
=12
法2
2.5×4.8
=2.5×0.6×8
=1.5×8
=12
法3
2.5×4.8
=5×4.8÷2
=24÷2
=12

Answer 3

2.5*4.8=2.5*4+2.5*0.8=10+2=12
2.5*4.8=2.5*5-2.5*0.2=12.5-0.5=12

Answer 4

2.5X4.8=2.5X4X1.2=10X1.2=12
2.5X4.8=(2+0.5)X4.8=9.6+2.4=12

Answer 5

2.5x4.8=2.5x(4+0.8)
=10+2
=12;
2.5x4.8=(5/2)x(24/5)
=24/2
=12;
2.5x4.8=2.5x4x1.2
=1x1.2
=1.2.