Question

Zad A4 str. 28 ćw. II kl.5 a)(trzy całe ) 3 2/3 + 5/7 b) 2 3/8 + 4 4/5 c) 7 3/4 - 5 2/3 d) 8 1/5 - 4 5/6 e)1 6/9 + 3 11/18 f) 5 2/7 - 1 9/21

Answer 1

a)(trzy całe ) 3 2/3 + 5/7  = 11/3 + 5/7 = 77/21 + 15/21 = 92/21 = 4 8/21

b) 2 3/8 + 4 4/5 = 19/8 + 24/5 = 95/40 + 192/40 = 287/40 = 7 7/40

c) 7 3/4 - 5 2/3 = 31/4 - 17/3 = 93/12 - 68/12 = 25/12 = 2 1/12

d) 8 1/5 - 4 5/6= 41/5 - 29/6 = 246/30 - 145/30 = 101/30 = 3 11/30

e)1 6/9 + 3 11/18 = 15/9 + 65/18 = 30/18 + 65/18 = 95/18 = 5 5/18

f) 5 2/7 - 1 9/21 = 37/7 - 30/21 = 111/21 - 30/21 = 81/21 = 3 18/21

Answer 2

a)(trzy całe ) 3 2/3 + 5/7 =11/3+5/7=77/21+15/21=95/21=4 11/21

b) 2 3/8 + 4 4/5 =19/8+24/5=95/40+192/40=287/40= 4 32/40=4 4/5

c) 7 3/4 - 5 2/3 =31/4-17/3=93/12-68/12=25/12=2 1/12

d) 8 1/5 - 4 5/6 =41/5-29/6=246/30-145/30=101/30=3 11/30

e)1 6/9 + 3 11/18 =15/9-65/18=30/18-65/18=- 35/18=- 1 17/18

f) 5 2/7 - 1 9/21=37/7-30/21=111/21-30/21=81/21=3 18/21