345,789-123,45=?
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\(123,45:0,5+123,45+0,2+123\times3\)
\(=123,45\times2+123,45\times5+123,45\times3\)
\(=123,45\times\left(2+5+3\right)\)
\(=123,45\times10\)
\(=1234,5\)
123,45:0,5+123,45:0,2+123x3
=123,45:\(\frac{1}{2}\)+123,45:\(\frac{1}{5}\)+123x3
=123,45 x 2+123,45 x 5 +123x3
=123,45x(2+5) +123x3
=123,45x7+123x3
=123x7 +0,45x7 +123x3
=123x(7+3)+0,45x7
=123x10+0,45x7
=1230+ 3,15
=1233,15
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123,45 - 67,89 - 23,45
= ( 123,45 - 23,45 ) - 67,89
= 100 - 67,89
= 32,11
Mk nhanh nhất đó
123,45 - 67,89 - 23,45 =
(123,45 - 23,45) - 67,89 =
100 - 67,89=
32,11
![](https://rs.olm.vn/images/avt/0.png?1311)
123,45 x 135 - 123,45 x 36 + 123,45 = 123,45 x 135 - 123,45 x 36 + 123,45 x 1
= 123,45 x ( 135 - 36 + 1 )
= 123,45 x 100
= 12345
123,45 x 135 - 123,45 x 36 + 123,45
= 123,45 x ( 135 - 36 + 1 )
= 123,45 x 100
= 12345
345,789 - 123,45 = 222,33900
k dùm mk nha các bn!!
\(345,789-123.45=222.339\)