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5/14 x 7 = 5/14 x 7/1 = 5/2 = 2 1/2
5/9 x 6 = 5/9 x 6/1 = 10/3 = 3 1/3
3/7 x 4/5 = 12/35
4/9 x 3/8 = 1/6
3 3/5 x10 = 18/5 x 10 =36
2 1/4 x 2/3 = 9/4 x 2/3 = 1 1/2
1 7/8 x 2 2/5 = 15/8 x 12/5 = 9/2 = 4 1/2
3 1/3 x 4 4/5 = 10/3 x 24/5 = 16
zad 15
a) 2/3 doby = 400 nie
b) 7/8 liczby 400 = 350 tak
c) 1 3/4 liczby 200 = 350 tak
d) 1 1/5 = 48 nie
zad 16
1/3 doby = 8 h
3/4 doby = 18 h
1 2/3 doby = 40 h
1/6 doby = 4 h
4/5 kg = 80 dag
1/25 kg = 4 dag
1 3/4 kg = 175 dag
2 7/20 kg = 235 dag
zad 17
a) 1 1/20
b) 7/12
c) 18
d) 1 13/15
e) 6/55
f) 1 1/2
zad 18
7 mld x 4/5 = 28/5 = 5 3/5
odp. W Azji mieszka 5 3/5 miliarda ludzi.
liczę na naj!!!!