Odpowiedź:
A
1. Oblicz:
a)
3•7/8 = 21/8 = 2 5/8
b)
8/7•3 = 24/7 = 3 3/7
g)
5•7/10 = 7/2 = 3 1/2
d)
2 1/5 •3 = 11/5 * 3 = 33/5 = 6 3/5
e)
5•10 1/2 = 5 * 21/2 = 105/2 = 52 1/2
f)
10 * 8 2/3 = 10 * 26/3 = 260/3 = 86 2/3
b)
c)
2 * 1 1/7 = 2 * 8/7 = 16/7 = 2 2/7
j)
4 * 5 5/12 = 4 * 65/12 = 65/3 = 21 2/3
k)
6 2/8 * 6 = 50/8 * 6 = 50/4 * 3 = 25/2 * 3 = 75/2 = 37 1/2
3 * 5 5/6 = 3 * 35/6 = 35/2 = 17 1/2
h)
2/7* 14 = 2 * 2 = 4
i)
2/18 * 12 = 2/3 * 2 = 4/3 = 1 1/3
Szczegółowe wyjaśnienie: