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![](https://rs.olm.vn/images/avt/0.png?1311)
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\(4578=2\cdot3\cdot7\cdot109\)
\(22725=3^2\cdot5^2\cdot101\)
\(478=2\cdot239\)
![](https://rs.olm.vn/images/avt/0.png?1311)
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( -99 ) . ( 1 - 789 ) - 789 . 99 = 99.(789 - 1 - 789) = 99.(-1)=-99
![](https://rs.olm.vn/images/avt/0.png?1311)
\(11\div\left\{\frac{7}{8}-3\cdot\left[0,25\div\left(1\frac{1}{3}+2\cdot\frac{1}{3}\right)\right]\right\}\)
\(=11\div\left\{\frac{7}{8}-3\cdot\left[\frac{1}{4}\div\left(\frac{4}{3}+2\cdot\frac{1}{3}\right)\right]\right\}\)
\(=11\div\left\{\frac{7}{8}-3\cdot\left[\frac{1}{4}\div\left(\frac{4}{3}+\frac{2}{3}\right)\right]\right\}\)
\(=11\div\left\{\frac{7}{8}-3\cdot\left[\frac{1}{4}\div2\right]\right\}\)
\(=11\div\left\{\frac{7}{8}-3\cdot\frac{1}{8}\right\}\)
\(=11\div\left\{\frac{7}{8}-\frac{3}{8}\right\}\)
\(=11\div\frac{1}{2}\)
\(=22\)
b) 101*789 + 456*128 - 789 + 912*436
= 789*100 + 456*128 + 912*436
= 789*100 + 912*64 + 912*436
= 789*100 + 912*500
= 100*(789 + 912*5)
= 100*5349
= 534900
![](https://rs.olm.vn/images/avt/0.png?1311)
789 x 120 + 789 x 470 + 789 x 410
= 789 x (120 + 470 + 410)
= 789 x 1000
= 789 000
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(2x-1) .789 = 0
2x - 1 = 0
2x = 1
x = 1: 2
x = 0,5
![](https://rs.olm.vn/images/avt/0.png?1311)
= 789 x ( 67 + 89 )
= 789 x 156
= 232084
chúc bạn học tốt !
3540 mk nhanh nhất k cho mk nha!!!Thanks nhìu
1 + ( - 789 ) - 250 +4578
= ( - 1038 )+ 4578
= 3540
ai tk mik mik tk lại