2.4x0.3+0.6x2.1的简便计算
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2.4×0.3+0.6×2.1
=(0.6×4)×0.3+0.6×2.1
=0.6×4×0.3+0.6×2.1
=0.6×(4×0.3)+0.6×2.1
=0.6×1.2+0.6×2.1
=0.6×(1.2+2.1)
=0.6×3.3
=1.98
=(0.6×4)×0.3+0.6×2.1
=0.6×4×0.3+0.6×2.1
=0.6×(4×0.3)+0.6×2.1
=0.6×1.2+0.6×2.1
=0.6×(1.2+2.1)
=0.6×3.3
=1.98
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计算如下：
2.4×0.3+0.6×2.1
=1.2×0.6+0.6×2.1
=0.6×（1.2+2.1）
=0.6×3.3
=1.98
2.4×0.3+0.6×2.1
=1.2×0.6+0.6×2.1
=0.6×（1.2+2.1）
=0.6×3.3
=1.98
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2.4x0.3+0.6x2.1
=2.4x0.3+0.3*4.2
=0.8*0.9+0.9*1.4
=0.72+1.4-0.14
=1.4+0.6-0.02
=2-0.02
=1.98
=2.4x0.3+0.3*4.2
=0.8*0.9+0.9*1.4
=0.72+1.4-0.14
=1.4+0.6-0.02
=2-0.02
=1.98
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