(1)4×(-0.25) (2)(-1又3分之2)×2.4

问题描述:

(1)4×(-0.25) (2)(-1又3分之2)×2.4
(3)(-25)×3分之5分之3

(1)4×(-0.25)
= 4×(-4分之1)
= -1
2)(-1又3分之2)×2.4
= (-3分之5)×5分之12
= -3分之12
= -4
(3)(-25)×3分之5分之3
= -25×5分之1
= -5