题目内容

【题目】下面各题,怎样算简便就怎样算

3.90.566.10.44 40.5×21.5+59.5×21.5

0.4×[0.75+0.65÷0.56] 9.1÷0.4÷2.5

【答案】11215019.1

【解析】

3.90.566.10.44 40.5×21.5+59.5×21.5

=3.96.1)+(0.560.44 =21.5×(40.5+59.5

=10+1 =21.5×100

=11 =2150

0.4×[0.75+0.65÷0.56] 9.1÷0.4÷2.5

= 0.4×[1.4÷0.56] = 9.1÷0.4×2.5

=0.4×2.5 =9.1÷1

=1 =9.1

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