
计算下列各题,怎样简便就怎样计算.4.6×4.94.8×9.25×7.64.2×99+4.25.6÷3
计算下列各题,怎样简便就怎样计算.4.6×4.94.8×9.25×7.64.2×99+4.25.6÷3.59.6÷0.8÷0.417.8÷(1.78×4)...
计算下列各题,怎样简便就怎样计算.4.6×4.94.8×9.25×7.64.2×99+4.25.6÷3.59.6÷0.8÷0.417.8÷(1.78×4)
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(1)4.6×4.9, =4.6×(5-0.1), =4.6×5-4.6×0.1, =23-0.46, =22.54; (2)4.8×9.25×7.6, =44.4×7.6, =337.44; (3)4.2×99+4.2, =4.2×(99+1), =4.2×100, =420; (4)5.6÷3.5=1.6; (5)9.6÷0.8÷0.4, =12÷0.4, =30; (6)17.8÷(1.78×4), =17.8÷1.78÷4, =10÷4, =2.5. |
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