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246x17一123x33简算
456x123123123
一123x
456456怎样
简算
答:
456x123123123
一123x
456456 =456x123x1001001一123x456x1001 =456x123x(1001001-1001)=456x123x1000000 =56088x1000000 =56088000000 望采纳,谢谢!
怎么
简便计算
169
x123
一23
X
169
答:
169
x123
一23
X
169 =169x(123一23)=169X100 =16900
320x124一321
x123简便计算
答案
答:
320x124一321
x123
=320x124一(320+1)x(124-1)=320x124一320x124-124+320+1 =-124+320+1 =197 或者 320x124一321x123 =320x(123+1)一(320+1)x123 =320x123+320-320x123-123 =320x123-320x123+320-123 =(320x123-320x123)+320-123 =320-123 =197 ...
320x124一321
x123简便计算
答:
320x124一321
x123
=320x(123+1)一(320+1)x123 =320x123+320-320x123-123 =320x123-320x123+320-123 =(320x123-320x123)+320-123 =320-123 =197 或者 320x124-321x123 =320x124-(320+1)x(124-1)=320x124-(320x124+124-320-1)=320x124-320x124-124+320+1 =-124+...
123x
92
简算
怎么算这怎么写百
答:
123x
92 =123×(100-8)=123×100-123×8 =12300-984 =11316
123
×57+41×30+369×11怎样
简便计算
?
答:
解:123×57+41×30+369×11 =123x57+123x10+
123x33
=123x(57+10+33)=123x100 =12300
123x18
一123X
3185x
123简便计算
答:
123x18
一123X
3+185x
123简便计算
=123x(18-3+185)=123x200 =24600
246x
25÷
123
÷5
简便方法计算
答:
246x
25÷123÷5=246÷
123x
(25÷5)=2x5=10
78
X123
一78×22一78
简便计算
?
答:
78*
123
-78*22-78 =78(123-22-1)=78*100=7800
87
X123
一23X87的
简便计算
过程?
答:
解决此问题,你要联想乘法的分配律a.b+a.c=a(b+c).只是这里有一个符号陷阱,减号,我们可以看成如下形式:87*
123
+(-23)*87 =87*(123+(-23))=87*(123-23)=87*100 =8700
<涓婁竴椤
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