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12 : 3 = 4 x 4 = 16
20 x 3 = 60
90 : 1 = 90
123 - 123 = 0
10 x 9 = 90 : 9 = 10
12 - 9 = 3 x 9 = 27
23 - 5 = 18
123 + 12 = 135
1000 - 200 = 800
333 - 111 = 222
\(20.3=60\)
\(90.1=90\)
\(123-123=0\)
\(10.9=\frac{810}{9}=90\)
\(23-5=15\)
\(123+12=135\)
\(1000-200=800\)
\(333-111=222\)
![](https://rs.olm.vn/images/avt/0.png?1311)
123-x=123.(12-1)
123-x=123.11
123-x=1353
x=1353:123
x=11
vậy x=11
Bài làm
123 - x = 123 . ( 12 - 1 )
123 - x = 123 . 11
123 - x = 1353
x = 123 - 1353
x = -1230
Vậy x = -1230
# Học tốt #
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
12 - 3 = 9 + 91 = 100 + 10 + 1 = 111
123 - 2 + 111 = 121 + 111
= 232
12 : 3 = 4 x 4 = 16 + 45 = 61
12 - 3 = 9
12 - 3 = 9 + 91 = 100 + 10 + 1 = 111
123 - 2 + 111 = 121 + 111
= 232
12 : 3 = 4 x 4 = 16 + 45 = 61
12 - 3 = 9
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98 x 456 x 123 x 753 x 246 x 2222 x 11 x 11 x 11 x 25 x 36 x 25 x 12 x 13 x 159 x 487 x 258 x 12589 x 1524 x ( 36987 - 36987 ) = 0
:)))
98 x 456 x 123 x 753 x 246 x 2222 x 11 x 11 x 11 x 25 x 36 x 25 x 12 x 13 x 159 x 487 x 258 x 12589 x 1524 x ( 36987 - 36987 ) =0
ht
k mk nha
![](https://rs.olm.vn/images/avt/0.png?1311)
X-123=12
X =12+123
X =135
x - 123 = 12
x = 12 + 123
x = 245