计算并验算 54+(85-43)
问题描述:
计算并验算 54+(85-43)
答
54
答
54+(85-43)=54+42=96
验算:96-(85-43)=96-42=54
答
54+(85-43)
=54+42
=96
验算:96-(85-43)
=96-42
=54