4.2×6.7+6.7×1.2+3.3×5.4简便计算

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4.2×6.7+6.7×1.2+3.3×5.4简便计算
4.2×6.7+6.7×1.2+3.3×5.4简便计算

4.2×6.7+6.7×1.2+3.3×5.4简便计算
4.2×6.7+6.7×1.2+3.3×5.4
=6.7×(4.2+1.2)+3.3×5.4
=6.7×5.4+3.3×5.4
=(6.7+3.3)×5.4
=10×5.4
=54

6.7×(4.2+1.2)+3.3×5.4
=5.4×(6.7+3.3)=54

(4.2+1.2)x6.7+3.3x5.4=5.4x(6.7+3.3)=5.4x10=54

原式=(4.2+1.2)6.7+3.35.4
=(3.3+6.7)5.4=54

有手机就用计算机功能呗,

先算前面的