9/20×2/3+5/14×7/25; 3. 3/4×2/5-3. 6/25×5/27

Предыдущий
вопрос Следующий
вопрос

To solve these calculations, we first carry out the operations within the brackets and then perform the multiplication and division.

1) 9/20 2/3 + 5/14 7/25
= 9/20 2/3 + 5/14 7/25
= 3/10 + 5/50
= 3/10 + 1/10
= 4/10
= 2/5

2) 3/4 2/5 - 6/25 5/27
= 3/4 2/5 - 6/25 5/27
= 6/20 - 30/675
= 3/10 - 2/45
= 27/90 - 4/90
= 23/90

Therefore, the solutions to the calculations are:
1) 2/5
2) 23/90