Question

Oblicz:

4 2/5+0,15=

14 4/7-2,75=

7 2/5+3 3/4-5,7

6 1/3-(4,12+2,18)=

1 7/10+1 1/15:2 2/3=

(1 3/5+2,2):6 1/3=

Answer 1

4 2/5+0,15=4 40/100+15/100=4 55/100=4 11/20

14 4/7-2,75=14 400/700-2 525/700=13 1100/700-2 525/700=11 575/700=11 23/28

7 2/5+3 3/4-5,7=7 8/20+3 15/20-5 14/20=10 23/20-5 14/20=5 9/20

6 1/3-(4,12+2,18)=6 1/3-6 30/100=6 1/3-6 3/10=6 10/30-6 9/30=1/30

1 7/10+1 1/15:2 2/3=17/10+16/15:8/3=17/10+16/15*3/8=17/10+2/5=17/10+4/10=21/10=2 1/10 lub 2,1

(1 3/5+2,2):6 1/3=(26/10+2 2/10):19/3=2 28/10*3/19=48/10*3/19=144/190=72/95