10928 : 65 +81-189 =
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\(65\left(75+189\right)-75\left(65+189\right)\)
\(=65.75+65.189-75.65-75.189\)
\(=\left(65.75-75.65\right)+\left(65.189-75.189\right)\)
\(=0+\left(65-75\right).189\)
\(=0+\left(-10\right).189\)
\(=-10.189\)
\(=-1890\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x:\left(234:2+12\right)=10928\)
\(x:\left(117+12\right)=10928\)
\(x:129=10928\)
\(x=1409712\)
\(x:\left(234:2+12\right)=10928\)
\(\Leftrightarrow x:\left(117+12\right)=10928\)
\(\Leftrightarrow X:129=10928\)
\(\Leftrightarrow X=1409712\)
![](https://rs.olm.vn/images/avt/0.png?1311)
94−58+189−65+87−45+12
=36+189−65+87−45+12
=225−65+87−45+12
=160+87−45+12
=247−45+12
=202+12
=214
Hok tốt !
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 65 = 81 - 12
x + 65 = 69
x = 69 - 65
x = 4
Vậy x = 4
K mk nha
Mk k lại
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 216 + 65 – 81 = 281 – 81 = 200.
b) 749 – 562 + 50 = 187 + 50 = 237.
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{13}{90}\)+ \(\frac{1}{4}\)+ \(\frac{77}{90}\)
= \(\left(\frac{13}{90}+\frac{77}{90}\right)+\frac{1}{4}\)
= 1 + \(\frac{1}{4}\)
= \(\frac{5}{4}\)
\(10928:65+81-189\)
\(=168,\text{123076923}+81-189\)
\(=249,\text{123076923}-189\)
\(=60,\text{123076923}\)
\(\text{Hok tốt!}\)
\(\text{@Kaito Kid}\)
60,123076923 nhé bn chúc bn học tốt nghen