Упр.836 ГДЗ Колягин Ткачёва 8 класс (Алгебра)

1) 48,3+(17,83•16,94)/8,367;
2) 67,8-(8604•48,4)/7651;
3) 5,31•(3,57•4,28-7,04);
4) 1,34•(8354/375+37,6).

1. $$48{,}3+\frac{17{,}83\cdot 16{,}94}{8{,}367}\approx 48{,}3+\frac{301{,}9802}{8{,}367}\approx 48{,}3+36{,}1\approx 84{,}4.$$

2. $$67{,}8-\frac{8604\cdot 48{,}4}{7651}\approx 67{,}8-\frac{416097{,}6}{7651}\approx 67{,}8-54{,}4\approx 13{,}4.$$

3. $$5{,}31\cdot(3{,}57\cdot 4{,}28-7{,}04)\approx 5{,}31\cdot(15{,}2796-7{,}04)\approx 5{,}31\cdot 8{,}2396\approx 43{,}8.$$

4. $$1{,}34\cdot\left(\frac{8354}{375}+37{,}6\right)\approx 1{,}34\cdot(22{,}2773+37{,}6)\approx 1{,}34\cdot 59{,}8773\approx 80{,}2.$$

Ответ

$$84{,}4;\ 13{,}4;\ 43{,}8;\ 80{,}2.$$