Question

1)а) 7,8 *3,6; в) 5,31* 8,6; б) 3,6:1,8; г) 70,7765:3,53 2)а) 2,6+7х=6,8; б) х:6+2,8=3,7. 3)Вычислите: (39,3+116,7)0,39 – 2,45:25 4)Туристы в первый день прошли 12 км, во второй – в 1,7 раза больше, чем в первый. Какой путь они прошли в третий день, если длина маршрута 40 км

Answer 1

Ответ:

Пошаговое объяснение:

1а) 28.08

б)2

в) 45.666

г)20.05

2а) 7х=6.8-2.6

7х=4.2

х=0.6

б) х=3.7-2.8*6

х=-13.1

3) 60.742

4)12*1.7=20.4-за 2ой день

12+20.4=32.4-за 2 дня

40-32.4=7.6

ответ: за 3 день туристы прошли 7.6км

Answer 2

Ответ:

1)a)28,08

б)45,666

в)36 18

36 2

0

г)707765 35300

70600 20,05

176500

176500

0

2)а)2,6+7x=6,8

7x=6,8-2,6

7x=4,2

x=4,2/7

x=0,6

б)x:6+2,8=3,7

x:6=3,7-2,8

x:6=0,9

x=0,8*6

x=5,4

3)(39,3+116,7)0,39-2,45:25

39,3+116,7=156

156*0,39=60,84

2,45/25=0,098

60,84-0,098=60,742

4)1)12:1,7=20,4 второй день

2)12+20,4=32,4 за два дня

3)49-32,4=7,6 км за третий день

Пошаговое объяснение:

Answer 3

а) 7.8 * 3.6 = 28.08 в) 5.31 * 8.6 = 45.666 б) 3.6 / 1.8 = 2 г) 70.7765 / 3.53 = 20.04

а) To solve for x in the equation 2.6 + 7x = 6.8, we need to isolate the variable x.

Subtracting 2.6 from both sides: 7x = 6.8 - 2.6 7x = 4.2

Dividing both sides by 7: x = 4.2 / 7 x = 0.6

б) To solve for x in the equation x/6 + 2.8 = 3.7, we need to isolate the variable x.

Subtracting 2.8 from both sides: x/6 = 3.7 - 2.8 x/6 = 0.9

Multiplying both sides by 6: x = 0.9 * 6 x = 5.4

To calculate (39.3 + 116.7) * 0.39 - 2.45 / 25, we perform the operations in the parentheses first, then proceed with the remaining calculations.

(39.3 + 116.7) * 0.39 = 156 * 0.39 = 60.84

Now, we subtract 2.45 divided by 25: 2.45 / 25 = 0.098

Finally, we subtract 0.098 from 60.84: 60.84 - 0.098 = 60.742

Therefore, the result is 60.742.

Let's denote the distance they traveled on the third day as D3.

On the first day, they traveled 12 km. On the second day, they traveled 1.7 times more than on the first day, which is 1.7 * 12 = 20.4 km.

The total distance traveled on the first two days is 12 + 20.4 = 32.4 km.

The remaining distance to cover on the third day is 40 - 32.4 = 7.6 km.

Therefore, they traveled 7.6 km on the third day.