如题所述
15×(400-400÷25)÷5
=15÷5×[400(1-1/25)]
=5×400×24/25
=400×24/5
=80×24
=1920
=15÷5×[400(1-1/25)]
=5×400×24/25
=400×24/5
=80×24
=1920
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第1个回答 2023-07-11
解:原式=3×(400-16)
=1200-48
=1152本回答被网友采纳
=1200-48
=1152本回答被网友采纳
第2个回答 2023-07-11
简便计算:
15×(400-400÷25)÷5
=15÷5×[400(1-1/25)]
=5×400×24/25
=400×24/5
=80×24
=1920
15×(400-400÷25)÷5
=15÷5×[400(1-1/25)]
=5×400×24/25
=400×24/5
=80×24
=1920