2.8×1.3+3.6÷1.5简便运算？
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2.8×1.3+3.6÷1.5
=2.8×1.3+3.6×2/3
=2.8×1.3+1.2×2
=2.8×1.3+1.2×1.3+1.2×0.7
=1.3×(2.8+1.2)+1.2×0.7
=1.3×4+1.2×0.7
=5.2+0.84
=6.04
=2.8×1.3+3.6×2/3
=2.8×1.3+1.2×2
=2.8×1.3+1.2×1.3+1.2×0.7
=1.3×(2.8+1.2)+1.2×0.7
=1.3×4+1.2×0.7
=5.2+0.84
=6.04
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