4.2Ã7.8+2.2Ã4.2
=4.2Ãï¼7.8+2.2ï¼
=4.2Ã10
=42
=4.2Ãï¼7.8+2.2ï¼
=4.2Ã10
=42
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第1个回答 2020-08-28
4.2×7.8+2.2×4.2简便计算如下，
4.2×7.8+2.2×4.2
=4.2*(7.8+2.2)
=4.2*10
=42
4.2×7.8+2.2×4.2
=4.2*(7.8+2.2)
=4.2*10
=42
4.2×7.8+2.2×4.2简便计算
=4.2×（7.8+2.2）=4.2×10 =42
4.2×7点8+2点2×4点2的简便方法
=4.2×（7.8+2.2）=4.2×10 =42
4.2×7.8+2.2×4.2简便计算?
所以4.2×7.8+2.2×4.2简便计算的最后结果是42。
用简便方法4.2×7.8+2.2×4.2
4.2×7.8+2.2×4.2 =4.2*（7.8+2.2）=4.2*10 =42
4.2×7.8+22×042怎么简便计算?
4.2×7.8+22×0.42 =4.2×7.8+2.2×4.2 =4.2×（7.8+2.2）=4.2×10 =42
能简算的要简算 4.2x7.8十2.2x4.2
4.2x7.8十2.2x4.2 =4.2x(7.8+2.2)=4.2x10 =42
脱式计算(能简算的要用简算) 4.2×7.8+2.2×4.29.5×101(8×3.82)×1....
脱式计算（能简算的要用简算）4.2×7.8+2.2×4.2 9.5×101 （8×3.82）×1.25 0.125×72．答案 解析 （1）运用乘法的分配律进行简算，（2）把101化成100+1，再运用乘法的分配律进行简算，（3）去括号，再运用乘法的交换律、结合律进行简算，（4）把72化成8×9，再运用乘法的结合律...
4.2×7.8+2.2x4.2用简便计算怎么写
回答：(7.8+2.2)4.2=42
4.2x7.8十2.2x4.2怎样简便?
4.2×7.8+2.2×4.2 ＝4.2×（7.8+2.2）＝4.2×10 ＝42
4.2*7.8 2.2*4.2怎么用简便方法做
=4.2*(7.8＋2.2)=4.2*10 =42
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