请用简便计算来算出结果 梯等式,12.5×19.7×3.2 2.5×9.7—9.7×0.4 7.8×0.9868.34×1.4÷68.34×50 15÷7.5÷0.2×4.5
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![请用简便计算来算出结果 梯等式,12.5×19.7×3.2 2.5×9.7—9.7×0.4 7.8×0.9868.34×1.4÷68.34×50 15÷7.5÷0.2×4.5](/uploads/image/z/11308175-71-5.jpg?t=%E8%AF%B7%E7%94%A8%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%E6%9D%A5%E7%AE%97%E5%87%BA%E7%BB%93%E6%9E%9C+%E6%A2%AF%E7%AD%89%E5%BC%8F%2C12.5%C3%9719.7%C3%973.2+2.5%C3%979.7%E2%80%949.7%C3%970.4+7.8%C3%970.9868.34%C3%971.4%C3%B768.34%C3%9750+15%C3%B77.5%C3%B70.2%C3%974.5)
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请用简便计算来算出结果 梯等式,12.5×19.7×3.2 2.5×9.7—9.7×0.4 7.8×0.9868.34×1.4÷68.34×50 15÷7.5÷0.2×4.5
请用简便计算来算出结果 梯等式,
12.5×19.7×3.2 2.5×9.7—9.7×0.4 7.8×0.98
68.34×1.4÷68.34×50 15÷7.5÷0.2×4.5
请用简便计算来算出结果 梯等式,12.5×19.7×3.2 2.5×9.7—9.7×0.4 7.8×0.9868.34×1.4÷68.34×50 15÷7.5÷0.2×4.5
12.5×19.7×3.2
=12.5×19.7×8×0.4
=12.5×8×19.7×0.4
=100×19.7×0.4
=197×4
=788
2.5×9.7—9.7×0.4
=9.7×(2.5-0.4)
=(10-0.3)×2.1
=10×2.1-0.3×2.1
=21-0.63
=20.37
7.8×0.98
=7.8×(1-0.02)
=7.8-0.156
=7.644
68.34×1.4÷68.34×50
=68.34÷68.34×1.4×50
=1×1.4×50
=70
15÷7.5÷0.2×4.5
=2÷0.2×4.5
=10×4.5
=45
7.8×0.98
=7.8X(1-0.02)
=7.8X1-7.8X0.02
=6.36
请用简便计算来算出结果 梯等式,12.5×19.7×3.2 2.5×9.7—9.7×0.4 7.8×0.9868.34×1.4÷68.34×50 15÷7.5÷0.2×4.5
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