Răspuns:
Explicație pas cu pas:
a)
2*3/5 = 3/5 + 3/5 = 6/5
b)
3*2/5 = 2/5 + 2/5 + 2/5 = 6/5
c)
7*2/5 = 2/5 + 2/5 + 2/5 + 2/5 + 2/5 + 2/5 + 2/5 = 14/5
d)
2*7/5 = 7/5 + 7/5 = 14/5
e)
6*3/4 = 3/4 + 3/4 + 3/4 + 3/4 + 3/4 + 3/4 = 18/4
f)
3*3/2 = 3/2 + 3/2 + 3/2 = 9/2
g)
20*7/25 = 7/25 + 7/25 + 7/25 + 7/25 +7/25 + 7/25 +7/25 + 7/25 +7/25 + 7/25 +7/25 + 7/25 +7/25 + 7/25 +7/25 + 7/25 +7/25 + 7/25 +7/25 + 7/25 = 140/25
h)
1/36*21 = 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 = 21/36
