8角=0.8元,6角=0.6元,
(1)0.8×20=16(元);
答:买20枚8角邮票16元钱.
(2)0.6×30=18(元);
答:买30枚6角邮票18元钱.
(3)0.8×20+0.6×30,
=16+18,
=34(元);
答:一共花了34元钱.
(1)买20枚8角邮票多少钱? (2)买30枚6角邮票多少钱? (3)一共花了多少钱?
(1)买20枚8角邮票多少钱?
(2)买30枚6角邮票多少钱?
(3)一共花了多少钱?
数学人气:443 ℃时间:2020-04-19 11:36:59
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