Question

7/12 -1/2 дробь 1/2 -2/5 ; 2) 3/5 -4/15 дробь 3/4 -1/2 ; 3) 1/8 + 1/4 дробь 5/6+2/3 ; 4) 7/18 +1/6 дробь 2 1/2 +5/6

Answer 1

Ответ:

Пошаговое объяснение:

1) 7/12-1/2=7/12-6/12=1/12

1/2-2/5=5/10-4/10=1/10

1/12:1/10=1/12*10=5/6

2) 3/5-4/15=9/15-4/15=5/15=1/3

3/4-1/2=3/4-2/4=1/4

1/3:1/4=1/3*4=4/3=1 1/3

3) 1/8+1/4=1/8+2/8=3/8

5/6+2/3=5/6+4/6=9/6=3/2

3/8:3/2=3/8*2/3=1/4

4) 7/18+1/6=7/18+3/18=10/18=5/9

2 1/2+5/6=2 3/6+5/6=3 1/3

5/9:3 1/3=5/9*3/10=1/6

Answer 2

7/12 - 1/2 = (7/12 * 2/2) - 1/2 = 14/24 - 12/24 = 2/24 = 1/12

1/2 - 2/5 = (5/10) - (4/10) = 1/10

The final answer is:

1/12 - 1/10 = 5/120 - 12/120 = -7/120

3/5 - 4/15 = (9/15) - (4/15) = 5/15 = 1/3

3/4 - 1/2 = (6/8) - (4/8) = 2/8 = 1/4

The final answer is:

1/3 - 1/4 = (4/12) - (3/12) = 1/12

1/8 + 1/4 = (1/8 * 3/3) + (1/4 * 2/2) = 3/24 + 4/24 = 7/24

5/6 + 2/3 = (5/6 * 4/4) + (2/3 * 2/2) = 20/24 + 4/6 = 20/24 + 16/24 = 36/24 = 3/2

The final answer is:

7/24 ÷ 3/2 = 7/24 * 2/3 = 14/72 = 7/36

7/18 + 1/6 = (7/18 * 3/3) + (1/6 * 3/3) = 21/54 + 9/54 = 30/54 = 5/9

2 1/2 + 5/6 = (2 * 2/2 + 1/2) + 5/6 = 5/2 + 5/6 = (15/6 + 5/6) = 20/6 = 10/3

The final answer is:

5/9 + 10/3 = (5/9 * 3/3) + (10/3 * 9/9) = 15/27 + 90/27 = 105/27 = 35/9