6.2×6.51+3.9×0.62简便计算?
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这道题呢,是变型,把6.2就是提出来
6.2*6.51+0.49*6.2
=6.2*(6.51+0.49)
=6.2*10
=62
这道题那个数应该是4.9
6.2*6.51+0.49*6.2
=6.2*(6.51+0.49)
=6.2*10
=62
这道题那个数应该是4.9
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6.2×6.51+3.9×0.62
=6.2×6.51+0.39×6.2
=6.2×(6.51+0.39)
=6.2×6.9
=6.2×(7-0.1)
=6.2×7-6.2×0.1
=43.4-0.62
=42.78
=6.2×6.51+0.39×6.2
=6.2×(6.51+0.39)
=6.2×6.9
=6.2×(7-0.1)
=6.2×7-6.2×0.1
=43.4-0.62
=42.78
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6.2×6.51+3.9×0.62=0.62×65.1+3.9×0.62=0.62×(65.1+3.9)=0.62×70=43.4
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6.2×6.51+3.9×0.62简便计算为:
=6.2×6.51+(3.9÷10)×(10×0.62)
=6.2×6.51+0.39×6.2
=6.2×(6.51+0.39)
=6.2×7-0.62
=43.4-0.62
=42.78
=6.2×6.51+(3.9÷10)×(10×0.62)
=6.2×6.51+0.39×6.2
=6.2×(6.51+0.39)
=6.2×7-0.62
=43.4-0.62
=42.78
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