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2.2×0.36+0.783×.6 递等式
搞错了,是2.2×0.36+0.78×3.6
人气:447 ℃ 时间:2020-04-09 08:49:18
解答
2.2×0.36+0.78×3.6
=2.2*3.6+7.8*3.6
=(2.2+7.8)*3.6
=10*3.6
=36
扩大缩小后再用提公因式法...
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