简便计算:①10.32-1.98;②3.25+1.98

2023-04-27

问题描述:

10.32-1.98=3.25+1.98=




最佳答案:

①解法一:

10.32-1.98

=10.32-(2-0.02)

=10.32-2+0.02

=8.32+0.02

=8.34

解法二:

10.32-1.98

=10.32+0.02-0.02-1.98

=10.34-2

=8.34

②解法一:

3.25+1.98

=3.25+1.75+0.23

=5+0.23

= 5.23

解法二:

3.25+1.98

=3.25-0.02+0.02+1.98

=3.23+2

=5.23

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