а) 4 8/13-x=1 5/13 б) x+1 3/14=3 9/14 в) 2 11/15+x=5 2/15 г) x-2 5/16=4 13/16 д) 5 15/19-x=3 3/19 е) x+1 11/18=3 7/18

Question

Юстон

Математика

13 июля, 11:26

а) 4 8/13-x=1 5/13 б) x+1 3/14=3 9/14 в) 2 11/15+x=5 2/15 г) x-2 5/16=4 13/16 д) 5 15/19-x=3 3/19 е) x+1 11/18=3 7/18

+2

Ответы (1)

Знаешь ответ на этот вопрос?

Арапка · Answer 1

а) 4 8/13 - x = 1 5/13.

4 8/13 = (52 + 8) / 13 = 60/13.

1 5/13 = 18/13.

1. х = 60/13 - 18/13 = 42/13 = 3 3/13.

б) x + 1 3/14 = 3 9/14.

1 3/14 = (14 + 3) / 14 = 17/14.

3 9/14 = 51/14.

1. х = 51/14 - 17/14 = 34/14 сократим на 2 = 17/7 = 2 3/7.

в) 2 11/15 + x = 5 2/15.

2 11/15 = (30 + 11) / 15 = 41/15.

5 2/15 = (5 * 15 + 2) / 15 = 77/15.

1. х = 77/15 - 41/15 = 36/15 сократим на 3 = 12/5 = 2 2/5.

г) x - 2 5/16 = 4 13/16.

2 5/16 = (2 * 16 + 5) / 16 = 37/16.

4 13/16 = (4 * 16 + 13) / 16 = 77/16.

1. х = 77/16 + 37/16 = 114/16 сократим на 2 = 57/8 = 8 1/8.

д) 5 15/19 - x = 3 3/19.

5 15/19 = (5 * 19 + 15) / 19 = 110/19.

3 3/19 = 60/19.

1. х = 110/19 - 60/19 = 50/19 = 2 12/19.

е) x + 1 11/18 = 3 7/18.

1 11/18 = (1 * 18 + 11) / 18 = 29/18.

3 7/18 = (3 * 18 + 7) / 18 = 61/18.

1. х = 61/18 - 29/18 = 32/18 сократим на 2 = 16/9 = 1 7/9.