问题 解答题
用竖式计算.
7.4+12.86=20-5.674=141.2-48.98=
102+4.36=32.15-27.45=验算:12.9+5.01=验算:
答案

(1)7.4+12.86=20.26;

(2)20-5.674=14.326;

(3)141.2-48.98=92.22;

(4)102+4.36=106.36;

(5)32.15-27.45=4.7;

验算:

(6)12.9+5.01=17.91;

验算:

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