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33x6.7+0.67x67简算

33x6.7+0.67x67 =33x6.7+6.7x6.7 =6.7x(33+6.7) =6.7x39.7 =265.99 数有问题,不算简算。

9.9X6.7+0.67 =9.9x10x0.67+0.67 =99x0.67+0.67 =(99+1)x0.67 =100x0.67 =67

3.8x6.7+33x0.38 =3.8x6.7+3.3x3.8 =3.8x(6.7+3.3) =3.8x10 =38

4.25x6.7+5.75x6.7 =(4.25+5.75)x6.7 =10x6.7 =67

3.72x4.38+3.7x6.62-3.72 =3.72x(4.38+6.62-1) =3,72x10 =37.2

解:3.7x6.5+3.5 =3.7*(10-3.5)+3.5 =37-3.7*3.5+3.5 =37-2.7*3.5 =37-9.45 =27.55

2.6+7.4x6.7用简便的方法计算 =2.6+49.58 =52.18 没有合适的简便方法

脱式计算5.25x6.7+4.75x6.7怎么计算 5.25x6.7+4.75x6.7 =6.7×(5.27+4.75) =6.7×10 =67

65x0.32+6.5x6.7+6.5 =6.5×3.2+6.5x6.7+6.5 =6.5×(3.2+6.7)+6.5 =6.5×9.9+6.5 =6.5×(10-0.1)+6.5 =6.5×10-6.5×0.1+6.5 =65+6.5-0.65 =70.85

解答过程 6.7×3+6.7×6+6.7 =6.7×3+6.7×6+6.7×1 =6.7×(3+6+1) =6.7×10 =67 运用了乘法结合律

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