Verified answer

Ответ:

Объяснение:

а) 4 2/5 - ( 3 - 3/10) * 3 * 1/81 = 4,3

1) 3 - 3/10 = 2 10/10 - 3/10 = 2 7/10

2) 3 * 1/81 = 3/81 = 1/27

3) 2 7/10 * 1/27 = 27/10 * 1/27 = 1/10 = 0,1

4) 4 2/5 - 0,1 = 4,4 - 0,1 = 4,3

і

0,7 * 30 - 1/2 : 2/67 = 4,25

1) 0,7 * 30 = 21

2) 1/2 : 2/67 = 1/2 * 67/2 = 67/4 = 16 3/4 = 16 ,75

3) 21 - 16,75 = 4,25

4,3 > 4,25

б) 11 1/9 : ( 2 2/3 + 6 2/9) = 1,25

1) 2 2/3 + 6 2/9 = 2 6/9 + 6 2/9 = 8 8/9

2) 11 1/9 : 8 8/9 = 100/9 : 80/9 = 100/9 * 9/80 = 100/80 = 10/8 = 1 2/8 = 1,25

і

4 3/5 : 5 3/4 + 3,2 - 2 7/8 = 1 1/8 = 1,125

1) 4 3/5 : 5 3/4 = 23/5 : 23/4 = 23/5 · 4/23 = 4/5 = 0,8

2) 0,8 + 3,2 = 4

3) 4 - 2 7/8 = 3 8/8 - 2 7/8 = 1 1/8

1,25 > 1,125