POMÓŻ ! PROSZĘ <33
1.Oblicz:
1/4 + 1/5
2/3 + 5/7
1 i 1/10 + 5 i 4/5
5/6 + 3 i 11/12
1/4 + 1/5 + 3/10
5 + 7 i 8/9 + 4 i 1/2
2. Wykonaj odejmowanie :
11/12 - 4/12
20 - 3/7
14 i 2/5 - 3/5
32 - 4 i 5/6
85 i 10/11 - 26 i 4/11
27 i 3/8 - 19 i 5/8
3. Oblicz :
6/7 - 3/4
12/13 - 2/5
1 i 2/3 - 1/6
2 i 1/2 - 1 i 3/4
12 i 7/10 - 8 i 7/8
4 i 7/9 - 2 i 11/12
POMÓŻ ! PROSZĘ <33
Ps np. 3 i 11/12 to 3 całe i jedenaście dwunastych.
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1.
1/4 +1/5= 5/20+4/20=9/20
2/3 + 5/7 = 14/21+15/21= 29/21= 1 i 8/21
1 i 1/10 + 5 i 4/5= 11/10+ 29/5= 11/10+ 58/10 = 69/10= 6 i 9/10
5/6 + 3 i 11/12= 5/6 + 47/12= 10/12+47/12= 57/12= 4 i 9/12= 4 i 3/4
1/4 + 1/5 + 3/10= 5/20 + 4/20+ 6/20= 15/20= 3/4
5 + 7 i 8/9 + 4 i 1/2= 5/1 + 71/9 + 1/2= 23/18 + 142/18 + 9/18= 174/18= 9 i 12/18 = 9 i 2/3
2. Wykonaj odejmowanie :
11/12 - 4/12= 7/12
20 - 3/7= 20/1 - 3/7= 140/7 - 3/7= 137/7 = 19 i 4/7
14 i 2/5 - 3/5= 72/5- 3/5= 69/5= 13 i 4/5
32 - 4 i 5/6= 32/1 - 29/6= 192/6 - 29/6= 163/6= 27 i 1/6
85 i 10/11 - 26 i 4/11= 945/11 - 290/ 11= 655/11= 59 i 6/11
27 i 3/8 - 19 i 5/8= 219/8 - 157/8= 62
3. Oblicz :
6/7 - 3/4= 24/28 - 21/28= 3/28
12/13 - 2/5= nie da się sprowadzić do wspólnego mianownika
1 i 2/3 - 1/6= 5/3 - 1/6= 10/6 - 1/6= 9/6= 1 i 3/6= 1 i 1/3
2 i 1/2 - 1 i 3/4= 5/2 - 7/4= 10/4 - 7/4= 3/4
12 i 7/10 - 8 i 7/8=127/10 - 71/8= 1016/80 - 710/80= 306/80= 3 i 66/80 = 3 i 33/40
4 i 7/9 - 2 i 11/12= 43/9 - 35/12= 172/36 - 105/36= 67/36= 1 i 31/36
1.
1/4+1/5=5/20+4/20=9/20
2/3+5/7=14/21+5/21=29/21=1 i 8/21
1 i 1/10+5 i 4/5=11/10+58/10=69/10=6 i 9/10
5/6+3 i 11/12=5/6+47/12=10/12+47/12=4 i 9/12=4 i 3/4
1/4+1/5+3/10=5/20+4/20+16/20=15/20=3/4
5+7 i 8/9+4 i 1/2=5/1+71/9+9/2=90/18+142/18+81/18=313/18=17 i 7/18
2.
11/12-4/12=7/12
20-3/7=20/1-3/7=140/7-3/7=137/7=19 i 4/7
14 i 2/5-3/5=72/5-3/5=69/5=13 i 4/5
32-4 i 5/6=32/1-29/6=192/6-29/6=163/6=27 i 1/6
85 i 10/11-26 i 4/11=56 i 6/11
27 i 3/8-19 i 5/8=219/8-157/8=62/8=7 i 3/4
3.
6/7-3/4=24/28-21/28=3/28
12/13-2/5=60/65-26/65=34/65
1 i 2/3-1/6=5/3-1/6=10/6-1/6=9/6=1 i 1/2
2 i 1/2-1 i 3/4=5/2-7/4=10/4-7/4=3/4
12 i 7/10-8 i 7/8=127/10-71/8=508/40-355/40=153/40=3 i 33/40
4 i 7/9-2 i 11/12=43/9-35/12=172/36-105/36=67/36=1 i 31/36