列综合式计算或用方程解.(1)0.5与0.5的和乘0.5,积是多少?(2)某数的3倍减

2025-04-29 09:46:29
推荐回答(1个)
回答1:

(1)(0.5+0.5)×0.5,
=1×0.5,
=0.5;
答:积是0.5.

(2)(0.3×4+4.8)÷3,
=(1.2+4.8)÷3,
=6÷3,
=2;
答:这个数是2.