Zadanie 3
a) 7/8 : 3 = 7/8 : 1/3 = 7/24
5 : 2 1/4 = 5 : 9/4 = 5 * 4/9 = 20/9 = 2 2/9
7 1/4 : 9 = 29/4 * 1/9 = 29/36
b) 2/5 : 3/4 = 2/5 * 4/3 = 8/15
4 3/8 : 2/3 = 35/8 * 3/2 = 105/16 = 6 9/16
1 1/3 : 1 4/5 = 4/3 : 9/5 = 4/3 * 5/9 = 20/27
Odejmowanie
a) = 62/9 - 2/3 = 62/9 - 6/9 = 56/9 = 6 2/9
b) = 25/4 - 5/8 = 50/8 - 5/8 = 45/8 = 5 5/8
c) = 3/2 - 6/7 = 21/14 - 12/14 = 9/14
d) = 31/4 - 29/6 = 93/12 - 58/12 = 35/12 = 2 11/12
Zadanie 4
a) 1 2/3 * 9/4 = 5/3 * 9/14 = 15/14 = 1 1/14
4 3/18 * 9 = 75/18 * 9 = 75/2 = 37 1/2
b) 12 * 3 1/6 = 12 * 19/6 = 108
2 1/4 * 2 2/7 = 9/4 * 16/7 = 36/7 5 1/7
Pozdrawiam :)