0.8888×0.6+0.2222×7.6注意:简便运算知道的请告诉偶啊Thank you
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0.8888×0.6+0.2222×7.6注意:简便运算知道的请告诉偶啊Thank you
0.8888×0.6+0.2222×7.6
注意:简便运算
知道的请告诉偶啊
Thank you
0.8888×0.6+0.2222×7.6注意:简便运算知道的请告诉偶啊Thank you
把7.6拆成4*1.9
将4乘入0.2222.
原式=0.8888*0.6+0.2222*4*1.9
=0.8888*0.6+0.8888*1.9
=0.8888*(0.6+1.9)
=0.8888*2.5
这时,已知25*4=100（简便方法）
所以0.8888*2.5
=0.2222*4*2.5
=0.2222*10
=2.222
反正这道题是根据拆分和25*4的方法简便运算的,你也可以从第一步骤就直接为0.2222进行乘法分配律.
祝提问者数学更上一层楼~
加油哦~!
0.8888×0.6+0.2222×7.6
=0.2222*4*0.6+0.2222*7.6
=0.2222*(2.4+7.6)
=0.2222*10
=2.222
0.8888×0.6+0.2222×7.6
=0.8888×0.6+0.2222×(7+0.6)
=0.8888×0.6+0.2222×7+0.2222×0.6
=0.6×(0.8888+0.2222)+0.2222×7
=0.6×1.111+0.2222×7
=0.6666+0.2222×7
=0.6666+1.5554
=2.2222
0.8888×0.6+0.2222×7.6
=0.2222*4*0.6+0.2222*7.6
=0.2222*10
=2.222
0.8888×0.6+0.2222×7.6
=0.8888×0.6+0.2222×(7+0.6)
=0.8888×0.6+0.2222×7+0.2222×0.6
=0.6×(0.8888+0.2222)+0.2222×7
=0.6×1.111+0.2222×7
=0.6×0.2222×5+0.2222×7
=0.2222×(0.6×5+7)
=0.2222×10
=2.222
这道题的重点就是(1)把7.6分为7+0.6;(2)把1.111分为0.2222×5
0.8888×0.6+0.2222×7.6
=0.2222*4*0.6+0.2222*7.6
=0.2222*2.4+0.2222*7.6
=0.2222*(2.4+7.6)
=0.2222*10
=2.222
0.8888×0.6+0.2222×7.6
=0.2222×4×0.6+0.2222×7.6
=0.2222×(4×0.6+7.6)
=0.2222×(2.4+7.6)
=0.2222×10
=2.222
0.8888×0.6+0.2222×7.6
=0.2222*4*0.6+0.2222*7.6
=0.2222*10
=2.222