Question

1.
a)2 2/3-1 9/12+3 10/15
e)5 1/2-2 2/3+3 3/8
2.
a) 4/5*1/2
b)3/5*10/17*34/39
c)1/2*3 1/3
d)3 3/4 8 1 3/5
3.
a)6 1/2*4/13-8/15:2
b) 7 1/7 :1 11/14-1 2/5 *15/28
4.
a)7/8:4/5
b)5/12:1/9
c)2 1/2:3/7
d)4 3/8:1 3/32

Answer 1

1
a=8/3-21/12+55/15=160/60-105/60+220/60=275/60=4 35/60
e=11/2-8/3+27/8=132/24-64/24+81/24=149/24=6 5/24
2
a=po skruceniu =2/5*1/1=2/5
b=po skruceniu=3/1*2/1*2/39=12/39=4/12
c=po skruceniu=1/1*5/3=5/3=1 2/3
d=nie ma znakow ...niepoprawinie napisane
3
a=13/2*4/13-8/15:2=1/2*4/1-8/15:2/1=1/1*2/1-4/15*1/1=1/1*2/1-2/15*1/1=2/1-2/15=30/15-2/15=28/15=1 13/15
b=50/7:25/14-7/5*15/28=50/7*14/25-7/5*15/28=4/1-3/3=4-1=3
4
A=7/8*5/4=35/32=1 3/32
B=5/12*9/1=5/4*3/1=15/4=3 3/4
C=5/2*7/3=35/6=5 5/6
D=35/8:35/32=35/8*32/35=1/8*35/1=32/8=4