Question

Oblicz pamietajac o skracaniu
1. 8 * 2 3/4=
2. 15/16 * 8/20=
3. 3 4/9 * 5 1/7 =
4. 3 2/5 * 10=
5. 2 4/7 : 9 =
6. 25: 3 3/4 =
7. 3 1/2 : 4 2/3 =
8. 16 / 21 : 8 / 35 =

Answer 1

1.
8 * 2 3/4= 8 * 11/4 = 2 * 11 = 22
2.
15/16 * 8/20= 3/2 * 1/4 = 3/8
3.
3 4/9 * 5 1/7 = 31/9 * 36/7 = 31 * 4/7 = 124/7 = 17 5/7
4.
3 2/5 * 10= 17/5 * 10 = 17 * 2 = 34
5.
2 4/7 : 9 = 18/7 * 1/9 = 2/7
6.
25: 3 3/4 = 25 : 15/4 = 25 * 4/15 = 5 * 4/3 = 20/3 = 6 2/3
7.
3 1/2 : 4 2/3 = 7/2 : 14/3 = 7/2 * 3/14 = 1/2 * 3/2 = 3/4
8.
16 / 21 : 8 / 35 = 16/21 * 35/8 = 2/21 * 35 = 70/21 = 3 1/3