选择合适的方法简算. 选择合适的方法简算. (1)25×32×125 (2)317×71-317+317×30 (3)9
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/06/29 00:11:13
选择合适的方法简算.
选择合适的方法简算.
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![选择合适的方法简算. 选择合适的方法简算. (1)25×32×125 (2)317×71-317+317×30 (3)9](/uploads/image/z/18670414-22-4.jpg?t=%E9%80%89%E6%8B%A9%E5%90%88%E9%80%82%E7%9A%84%E6%96%B9%E6%B3%95%E7%AE%80%E7%AE%97.+%E9%80%89%E6%8B%A9%E5%90%88%E9%80%82%E7%9A%84%E6%96%B9%E6%B3%95%E7%AE%80%E7%AE%97.+%EF%BC%881%EF%BC%8925%C3%9732%C3%97125+%EF%BC%882%EF%BC%89317%C3%9771-317%2B317%C3%9730+%EF%BC%883%EF%BC%899)
(1)原式=25×4×(8×125)
=100000 (2)原式=317×(71-1+30)
=31700
(3)原式=(9998+2)+(998+2)+(98+2)+(8+2)
=11110 (4)原式=125×8×101
=101000
(5)原式=123×(102-2)
=12300 (6)原式=25×4×3×3
=900
=100000 (2)原式=317×(71-1+30)
=31700
(3)原式=(9998+2)+(998+2)+(98+2)+(8+2)
=11110 (4)原式=125×8×101
=101000
(5)原式=123×(102-2)
=12300 (6)原式=25×4×3×3
=900