Question

Oblicz
(1,2:3/5-1 1/3*0,3):1 1/7=
3 3/4*1,2+1,5:2 2/5- 1/8=
4/5+(1,2*5/12+0,8):1/8=


* mnożenie
Prosze o szybka odpowiedz!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

(1,2:3/5-1 1/3*0,3):1 1/7=
= (1,2 : 0,6 - 4/3 * 3/10) : 8/7 = (2 - 4/10) * 7/8 =
=1,6 * 0,875 = 1,4

3 3/4*1,2+1,5:2 2/5- 1/8=
= 3,75 * 1,2 + 1,5 : 2,4 - 0,125 =
= 4,5 + 0,625 - 0,125 = 5

4/5+(1,2*5/12+0,8):1/8=
= 0,8 + (0,5 + 0,8) * 8 = 0,8 + 1,3 * 8 = 0,8 + 10,4 = 11,2

Answer 2

(1,2:3/5-1 1/3*0,3):1 1/7= (12/10*5/3 - 4/3*3/10):8/7=(2 - 2/5):8/7=1 3/5:8/7=8/5*7/8=7/5=1 2/5
3 3/4*1,2+1,5:2 2/5- 1/8=15/4*12/10+15/10:12/5-1/8=9/2+15/10*5/12-1/8= 
4 1/2+5/6-1/8= 4 12/24+20/24-3/24=4 32/24-3/24=4 29/24=5 5/24
4/5+(1,2*5/12+0,8):1/8=4/5+(12/10*5/12+8/10):1/8=4/5+(1/2+8/10):1/8=4/5+(5/10+8/10):1/8=4/5+13/10*8/1 =4/5+52/5=56/5=11 1/5