Question

2.4×0.5简便方法计算？

Answer 1

2.4×0.25=0.6。简便计算过程如下:2.4×0.25=0.6×4×0.25=0.6×1=0.6或者2.4×0.25=(2.4÷0.4)×(0.25×4)=2.4÷0.4×1=2.4÷0.4=0.6扩展资料:乘法:1)乘法交换律:a*b=b*a2)乘法结合律:a*b*c=(a*b)*c=a*(b*c)3)乘法分配律:(a+b)*c=a*c+b*c;(a-b)*c=a*c-b*c除法:1)商不变的性质即被除数与除数同乘以或同除以一个数(零除外),商不变。a/b=(a*n)/(b*n)=(a/n)/(b/n)2)两个数的和(差)除以一个数,可以用这个数分别去除这两个数(在都能整除的情况下),再求两个商的和(差)。(a+b)/c=a/c+b/c;(a-b)/c=a/c-b/c

Answer 2

解：依题意得算式，
2.4×0.5
=（2+0.4）×0.5
=2×0.5+0.4×0.5
=1+0.2
=1.2
即2.4×0.5=1.2

Answer 3

解，2.4x0.5
=1.2×2×0.5
=1.2×(2×0.5)
=1.2

Answer 4

2.4乘以0.5就是2.4乘以1/2，也就是2.4除以2，等于1.2

Answer 5

解，2.4x0.5
=1.2x2x0.5
=1.2x(2x0.5)
=1.2