Выполните действия: 1) 5/8+3/8; 2) 8/15+2/15; 3) 17/25-12/25; 4) 28/45-13/45.

Question

Выполните действия:
1) 5/8+3/8;
2) 8/15+2/15;
3) 17/25-12/25;
4) 28/45-13/45.

Answer 1

1) 5/8 + 3/8 = 8/8 = 1
2) 8/15 + 2/15 = 10/15 = 2/3
3) 17/25 - 12/25 = 10/25 = 2/5 = 0.4
4) 28/45 - 13/45 = 15/45 = 1/3

Comments

17-12 =5 а не 10

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а да точно

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там будет 1/5 = 0.2

Answer 2

1. 0.625+0.375=1
2. 0.533+0.1333=0.666=10/15=2/3
3.5/25=1/5
4.15/45=1/3