Obicz i rozpisz; 1] 0,25 + 1 1/4 - 0,5= 2] 2/7 + 2 1/2 + 1 5/7 + 3 1/2= 3] 2/4 + 2 1/4 + 4= 4] 3 1/5 - 2 2/5 + 11 3/15= 5]1 2/3 - 1 1/2 + 1 5/6= 6]1 1/3 - 2/3 + 10 1/3= 7] 16 1/4 + 1/5 - 9/20= 8]2 1/5 - 2 + 4,8= 9]1 1/2 - 1 1/6 + 3 2/3=

1] 0,25 + 1 1/4 - 0,5=0,25+1,25-0,5=1,5-0,5=1
1/4=0,25
1 1/4=1,25

2] 2/7 + 2 1/2 + 1 5/7 + 3 1/2= (2/7+1 5/7) + (2 1/2 + 3 1/2)=2+6=8
2/7+5/7=1

3] 2/4 + 2 1/4 + 4= 6 3/4

4] 3 1/5 - 2 2/5 + 11 3/15= 3 1/5 + 11 1/5 - 2 2/5 = 14 2/5 - 2 2/5 = 12
3/15= 1/5

5]1 2/3 - 1 1/2 + 1 5/6=1 4/6 - 1 3/6 + 1 5/6 = 1/6 + 1 5/6 = 1+1=2
2/3=4/6
1/2=3/6

6]1 1/3 - 2/3 + 10 1/3= 1 1/3 +10 1/3 - 2/3 = 11 2/3 - 2/3 = 11

7] 16 1/4 + 1/5 - 9/20=16 5/20 + 4/20 - 9/20 = 16 9/20 - 9/20 = 16
1/4=5/20
1/5=4/20

8]2 1/5 - 2 + 4,8=2,2-2 + 4,8= 0,2 + 4,8 =5
1/5=2/10= 0,2

9]1 1/2 - 1 1/6 + 3 2/3= 1 3/6 - 1 1/6 3 + 3 4/6 = 2/6 + 3 4/6 = 3+1=4
1/2=3/6
2/3=4/6
2/6+4/6=6/6=1