580.
= (10/3×1/100)x10+7/40×20/7
1/30×10+1/2
1/3+1/2
5/6
(80/3×32/5)x(96/5:86/9)+(31/2-13/2):3
(80/3×5/32)x(96/5×9/86)+9:3
(5/3×5/2)x 432×215+3
5×72/43+3
360/43+3
489/43
780.
-4 3/10 — 6 4/5
-(4 3/10 + 6 4/5)
-(4+6) + (3/10+4/5)
-(10 + 11/10)
-(10+ 1 1/10)
-(10+ 1 + 1/10)
-(11+ 1/10)
-11 1/10
46/5-16 1/2
46/5-33/2
-73/10
-73/10
24/7 — 39/7
24/7 — 39/7
-15/7
802.
32/5
139/8 : (-263/16)
-139/8 x 16/263
139 x 2/263
-278/263
(-19/4) : 19/10
-19/4 x 10/19
-1/2×5
-5/2
991.
1/2=5/10
4/5=0,8
-36/100
3.25
1,45
1005/1000
-1212/1000
Ամիրյան Գրիգոր 