Question

424. Выполните сложение
1) 2/45 + 7/9 = 2/45 + 7/9 × 5/5 = 2/45 + 35/45 = 37/45;
-----------------------------------------------------------
2) 2/5 + 4/25 = 2/5 × 5/5 + 4/25 = 10/25 + 4/25 = 14/25;
-----------------------------------------------------------
3) 1/6 + 7/18 = 1/6 × 3/3 + 7/18 = 3/18 + 7/18 = 10/18 = 5/9.
-----------------------------------------------------------
4) 19/42 + 6/7 = 19/42 + 6/7 × 6/6 = 19/42 + 36/42 = 55/42;
-----------------------------------------------------------
5) 3/32 + 5/8 = 3/32 + 5/8 × 4/4 = 3/32 + 20/32 = 23/32;
-----------------------------------------------------------
6) 3/8 + 1/56 = 3/8 × 7/7 + 1/56 = 21/56 + 1/56 = 22/56 = 11/28.

Answer 1

1) 2/45 + 7/9 = 2/45 + 35/45 = 37/45

2) 2/5 + 4/25 = 10/25 + 4/25 = 14/25

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

4) 19/42 + 6/7 = 19/42 + 36/42 = 55/42 = 1 13/42

5) 3/32 + 5/8 = 3/32 + 20/32 = 23/32

6) 3/8 + 1/56 = 21/56 + 1/56 = 22/56