如题所述
因为3.4=1.7×2,所以原式等于1.7×2×7×1.5,运用乘法交换律就是1.7×7×(2×1.5)=35.7
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第1个回答 2021-09-16
解:3.4×7×1.5
=2×1.7×7×1.5
=3×1.7×7
=21×1.7
=1.7(20+1)
=34+1.7
=35.7本回答被网友采纳
=2×1.7×7×1.5
=3×1.7×7
=21×1.7
=1.7(20+1)
=34+1.7
=35.7本回答被网友采纳
第2个回答 2023-03-29
3.4ⅹ7x1.5
=3.4ⅹ10.5
=1.7*21
=1.7*20+1.7
=34+1.7
=35.7
=3.4ⅹ10.5
=1.7*21
=1.7*20+1.7
=34+1.7
=35.7
第3个回答 2021-09-15
3.4x7x1.5=3.4x0.5x7x3
=1.7x7x3
=11.9x3
=35.7
=1.7x7x3
=11.9x3
=35.7
第4个回答 2021-09-16
3.4×7×1.5
=(4-0.6)×1.5×7
=(4×1.5-0.6×1.5)×7
=(6-0.9)×7
=5.1×7
=35.7
=(4-0.6)×1.5×7
=(4×1.5-0.6×1.5)×7
=(6-0.9)×7
=5.1×7
=35.7