8.6×2.4÷8.6×2.4的简便计算
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8.6×2.4÷8.6×2.4
=8.6÷8.6×2.4×2.4
=1×2.4×2.4
=5.76
=8.6÷8.6×2.4×2.4
=1×2.4×2.4
=5.76
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=8.5 ÷ 8.5 x 2.4 x 2.4
=2.4 x 2.4
=(2+0.4) x (2+0.4)
=4 + 0.8 +0.8 +0.16
=4+1.6+0.16
=5.6+0.16
=5.76
=2.4 x 2.4
=(2+0.4) x (2+0.4)
=4 + 0.8 +0.8 +0.16
=4+1.6+0.16
=5.6+0.16
=5.76
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