列综合式计算或用方程解.(1)0.8减去0.8与0.8的积,所得的差再与0.8相乘,积

2025-05-01 05:52:21
推荐回答(1个)
回答1:

(1)(0.8-0.8×0.8)×0.8,
=(0.8-0.64)×0.8,
=0.16×0.8,
=0.128.
答:积是0.128.

(2)乙数:50÷(3-1),
=50÷2,
=25;
甲数:25+50=75;
答:甲数是75,乙数是25.