Question

Prosze o szybką pomoc klasa 5 ułamki zwykłe

Answer 1

Odpowiedź:

zad 3

a)

1 2/5 + 1/4 = 1 8/20 + 5/20 = 1 13/20

b)

5 3/5 + 1 3/4 = 5 12/20 + 1 15/20 = 6 27/20 = 7 7/20

c)

4 2/3 - 2 2/7 = 4 14/21 - 2 6/21 = 2 8/21

d)

8 1/10 - 6 3/5 = 8 1/10 - 6 6/10 = 7 11/10 - 6 6/10 = 1 5/10 = 1 1/2

e)

18 * 5 2/3 = 18 * 17/3 = 6 * 17 = 102

f)

2 1/4 * 1 2/7 = 9/4 * 9/7 = 81/28 = 2 25/28

g)

4 1/6 : 15 = 25/6 * 1/15 = 5/6 * 1/3 = 5/18

h)

4 2/7 : 3 1/8 = 30/7 : 25/8 = 30/7 * 8/25 = 6/7 * 8/5 = 48/35 = 1 13/35

Answer 2

Odpowiedź:

1 i 2/5 + 1/4 = 1 i 8/20 + 5/20 = 1 i 13/20

5 i 3/5 + 1 i 3/4  5 i 12/20 + 1 i 15/20 = 6 i 27/20 = 7 i 7/20

4 i 2/3 - 2 i 2/7 = 4 i 14/21 - 2 i 6/21 = 2 i 8/21

8 i 1/10 - 6 i 3/5 = 8 i 1/10 - 6 i 6/10 = 7 i 11/10 - 6 i 6/10 = 1 i 5/10 = 1 i 1/5

18 * 5 i 2/3 = 18 * 17/3 = 102

2 i 1/3 * 15 = 7/3 * 15 = 35

4 i 1/6 : 15 = 25/6 * 1/15 = 5/18

4 i 2/7 : 3 i 1/8 = 30/7 : 25/8 = 30/7 * 8/25 = 48/35 = 1 i 13/35