3.4ⅹ7x1.5的简便计算?
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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
=2×1.7×7×1.5
=3×1.7×7
=21×1.7
=1.7(20+1)
=34+1.7
=35.7
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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
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3.4x7x1.5=3.4x0.5x7x3
=1.7x7x3
=11.9x3
=35.7
=1.7x7x3
=11.9x3
=35.7
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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
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