列综合算式或方程计算.(1)4.08减去0.8与5的积,所得的差除以0.4,结果是多少?(2)4.5的4倍比一个数

2024-11-22 20:24:46
推荐回答(1个)
回答1:

(1)(4.08-0.8×5)÷0.4
=(4.08-4)÷0.4
=0.08÷0.4
=0.2
答:结果是0.2.

(2)(4.5×4-1.8)÷1.2
=(18-1.8)÷1.2
=16.2÷1.2
=13.5
答:这个数是13.5.

(3)659-(156+429)
=659-585
=74
答:156与429的和比659少74.

(4)1029-(145+2.5)
=1029-147.5
=881.5
答:差是881.5.