6.2×2.1-2.1×2.8-3.4×0.1的简便计算?
3个回答
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6.2×2.1-2.1×2.8-3.4×0.1
=2.1×(6.2-2.8)-3.4×0.1
=2.1×3.4-3.4×0.1
=(2.1-0.1)×3.4
=2×3.4
=6.8
=2.1×(6.2-2.8)-3.4×0.1
=2.1×3.4-3.4×0.1
=(2.1-0.1)×3.4
=2×3.4
=6.8
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6.2x2.1-2.1x2.8-3.4x0.1
=2.1(6.2-2.8)-3.4x0.1
=2.1x3.4-3.4x0.1
=3.4(2.1-0.1)
=3.4x2
=6.8
=2.1(6.2-2.8)-3.4x0.1
=2.1x3.4-3.4x0.1
=3.4(2.1-0.1)
=3.4x2
=6.8
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