840除以28加70乘18怎么简算
840除以28加70乘18怎么简算
数学人气:218 ℃时间:2020-02-03 09:41:04
优质解答
请将描述加上括弧.840除以28加70乘18怎么简算就是先约分840÷28+70×18=30+1260=1290
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