2
| \(x\) | \(5x-3\) | \(3-5x\) | \(x(3-5x)\) |
|---|---|---|---|
| \(-3\) | \(-18\) | \(18\) | \(-54\) |
| \(-2\) | \(-13\) | \(13\) | \(-26\) |
| \(-1\) | \(-8\) | \(8\) | \(-8\) |
| \(0\) | \(-3\) | \(3\) | \(0\) |
| \(1\) | \(2\) | \(-2\) | \(-2\) |
| \(2\) | \(7\) | \(-7\) | \(-14\) |
| \(3\) | \(12\) | \(-12\) | \(-36\) |
Обсуждение
4 сообщения1
Задание 1
| Выражение | \(x\) | Значение |
|---|---|---|
| \(x+3{,}2\) | \(-6{,}8\) | \(-3{,}6\) |
| \(-3{,}2\) | \(0\) | |
| \(1\frac13\) | \(4\frac{8}{15}\) | |
| \(-5x\) | \(-2{,}6\) | \(13\) |
| \(0\) | \(0\) | |
| \(1\) | \(-5\) | |
| \(2\frac{8}{15}\) | \(-12\frac23\) | |
| \(12x-7\) | \(-1\) | \(-19\) |
| \(0\) | \(-7\) | |
| \(-7{,}6\) | \(-98{,}2\) | |
| \(0{,}05\) | \(-6{,}4\) | |
| \(3-1{,}5x\) | \(4\) | \(-3\) |
| \(-2\) | \(6\) | |
| \(-\frac13\) | \(3{,}5\) | |
| \(0{,}8\) | \(1{,}8\) |
3 задание пж
3 задание
а) \(\frac{7}{16}\cdot\frac{8}{21}=\frac{1}{6}\);
б) \(-\frac{5}{11}\cdot\frac{33}{65}=-\frac{3}{13}\);
в) \(\frac{19}{23}\cdot\left(-\frac{46}{57}\right)=-\frac{2}{3}\).а) \(3\frac14\cdot3\frac9{13}=\frac{13}{4}\cdot\frac{48}{13}=12\);
б) \(-5\frac13\cdot1\frac12=-\frac{16}{3}\cdot\frac32=-8\);
в) \(-3\frac17\cdot1\frac3{11}=-\frac{22}{7}\cdot\frac{14}{11}=-4\).а) \(\frac57:\left(-\frac{10}{21}\right)=-\frac32=-1\frac12\);
б) \(-\frac45:\left(-1\frac1{15}\right)=\frac45\cdot\frac{15}{16}=\frac34\);
в) \(31\frac12:2\frac1{31}=\frac{63}{2}\cdot\frac{31}{63}=15\frac12\).а) \(\frac59\cdot(-9)=-5\);
б) \(-\frac45:9=-\frac4{45}\);
в) \(-14:\left(-2\frac45\right)=-14:\left(-\frac{14}{5}\right)=5\).а) \(6{,}5\cdot2{,}6=16{,}9\);
б) \(-5{,}3\cdot7{,}7=-40{,}81\);
в) \(-6{,}4\cdot(-1{,}3)=8{,}32\).а) \(0{,}81:0{,}009=90\);
б) \(0{,}1515:0{,}05=3{,}03\);
в) \(0{,}361:0{,}19=1{,}9\).
