-(7.8)X1.25X(-8)怎样用乘法运算法则?

问题描述:

-(7.8)X1.25X(-8)怎样用乘法运算法则?

-(7.8) X 1.25 X (-8)
= 7.8 X 1.25 X 8
= 7.8 X (1.25 X 8)
= 7.8 X 10
= 78