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计算下面各题,能简便计算的用简便方法计算.7.4×9.8-14.513.4+5.62+17.6+4.386.73×4.8+5.2×6.738.4÷0.6+8.4÷0.4(9.6+1.48÷3.7)÷85.8÷[4×(1.34-0.14)].
题目详情
计算下面各题,能简便计算的用简便方法计算. 7.4×9.8-14.5 | 13.4+5.62+17.6+4.38 | 6.73×4.8+5.2×6.73 |
8.4÷0.6+8.4÷0.4 | (9.6+1.48÷3.7)÷8 | 5.8÷[4×(1.34-0.14)]. |
▼优质解答
答案和解析
5.8÷[4×(1.34-0.14)],
=5.8÷(4×1.2),
=5.8÷4.8,
=1.2.
7.4×9.8-14.5, =7.4×(10-0.2)-14.5, =7.4×10-7.4×0.2-14.5, =74-1.48-14.5, =58.02; 13.4+5.62+17.6+4.38, =(13.4+17.6)+(5.62+4.38), =31+10, =41; 6.73×4.8+5.2×6.73, =6.73×(4.8+5.2), =6.73×10, =67.3; 8.4÷0.6+8.4÷0.4, =84÷6+84÷4 =14+21 =35; (9.6+1.48÷3.7)÷8, =9.6÷8+1.48÷3.7÷8, =1.2+0.05, =1.25; |
=5.8÷(4×1.2),
=5.8÷4.8,
=1.2.
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