3.4×1.5一|.7xO.6简便方法?
3个回答
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3.4×1.5-1.7×0.6
=3.4×1.5×3-1.7×2×0.6÷2
=3.4×1.5-3.4×0.3
=3.4×(1.5-0.3)
=3.4×1.2
=3.4×(1+0.2)
=3.4×1+3.4×0.2
=3.4+0.68
=4.08
=3.4×1.5×3-1.7×2×0.6÷2
=3.4×1.5-3.4×0.3
=3.4×(1.5-0.3)
=3.4×1.2
=3.4×(1+0.2)
=3.4×1+3.4×0.2
=3.4+0.68
=4.08
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3.4×1.5-1.7×0.6
=1.7×2×1.7-1.7×0.6
=1.7×3.4-1.7×0.6
=1.7×(3.4-0.6)
=1.7×2.8
=1.7×(3-0.2)
=1.7×3-1.7×0.2
=5.1-0.34
=4.76
=1.7×2×1.7-1.7×0.6
=1.7×3.4-1.7×0.6
=1.7×(3.4-0.6)
=1.7×2.8
=1.7×(3-0.2)
=1.7×3-1.7×0.2
=5.1-0.34
=4.76
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3.4x1.5-1.7x0.6
=1.7x2x1.5-1.7x0.6
=1.7x(2x1.5-0.6)
=1.7x2.4
=4.08
=1.7x2x1.5-1.7x0.6
=1.7x(2x1.5-0.6)
=1.7x2.4
=4.08
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