Question

К каждому примеру ответ должен быть с решением (по действиям)! Даю 18 баллов! Помогите, пожалуйста!!! 1) (4/5+4/7)*(3 3/8+2 11/4)2) (2 13/48+2 5/12):3 3/4-9 3/4:123) -3 1/7*(-8)-2,9:0,1+11/21:(-3 2/3)4) 4 1/3*5+2,4:(-0,1)-14/15:1 2/55) (6-2 4/5)*3 1/8-1 3/5:1/46) 3 1/7*(-4)-1,8:(-0,1)+20/21:1 2/37) 4 1/6*(1 1/2-3/5)+(3/4+5/6)*68) 7/9:1 1/6+2,7:(-0,1)-4 1/3*(-4)9) 7*2 6/7+53/12:(7/9-9/4)​

Answer 1

Ответ:

Пошаговое объяснение:

Answer 2

1. (4/5+4/7)*(3 3/8+2 11/4)

First, we need to simplify the fractions inside the parentheses: 4/5 + 4/7 = (28/35 + 20/35) = 48/35 3 3/8 + 2 11/4 = (27/8 + 23/4) = 103/8

Now we can multiply: (48/35)(103/8) = (48103)/(35*8) = 624/35

Final answer: 624/35

2. (2 13/48+2 5/12):3 3/4-9 3/4:12

First, we need to convert all mixed numbers to improper fractions: 2 13/48 = (248 + 13)/48 = 109/48 2 5/12 = (212 + 5)/12 = 29/12 3 3/4 = (34 + 3)/4 = 15/4 9 3/4 = (94 + 3)/4 = 39/4

Now we can simplify the expression: (109/48 + 29/12) ÷ (15/4) - (39/4 ÷ 12) = (109/48 + 116/48) ÷ (15/4) - (39/4 ÷ 12) = 225/48 ÷ (15/4) - (39/4 ÷ 12) = (225/48) * (4/15) - (39/4) * (1/12) = 15/16 - 13/4 = -41/16

Final answer: -41/16

3. -3 1/7*(-8)-2,9:0,1+11/21:(-3 2/3)

First, we need to convert the mixed number to an improper fraction: -3 1/7 = -22/7

Now we can simplify the expression: -22/7*(-8) - 2.9/0.1 + 11/21*(-11/3) = 176/7 + (-29) + (-11/9) = 1575/63 - 261/9 - 11/9 = 1575/63 - 272/9 = (15753)/(633) - (2727)/(97) = 525/21 - 1904/63 = (5253)/(213) - 1904/63 = 75/3 - 1904/63 = 25 - 32/9 = 223/9

Final answer: 223/9

4. 4 1/3*5+2,4:(-0,1)-14/15:1 2/5

First, we need to convert the mixed number to an improper fraction: 4 1/3 = (4*3 + 1)/3 = 13/3

Now we can simplify the expression: 13/3 * 5 + 2.4/(-0.1) - (14/15)/(7/5) = 65/3 - 24 + (14/15)(5/7) = 65/3 - 24 + 2/3 = (653)/(33) - (243)/3 + 2/3 = 65/1 - 24 -