1) (910/7)+(10*19)=130+190=320
2) (512+88)-(300/2)=600-150=450
3) (29*30)+(84/12)=870+7=877
1 1/3 + 730 + 2 3/5 = 733 + 1/3 + 3/5 = 733 + 5/15 + 9/15 = 733 целых 14/15
2 5/6 - (1 1/3 - 1/2) = 2 5/6 - (1 2/6 - 3/6) = <span>2 5/6 - 1 2/6 + 3/6 =
= 1 целая (5-2+3)/6 = 1 целая 6/6 = 2
1 1/2 - 3/4 + 7/8 = 1 4/8 - 6/8 + 7/8 = 1 целая + (4-6+7)/8 = 1 целая 5/8</span>
А) =48(5/17+12/17)=48*17/17=48*1=48
б) = 11/13(11/15+2/15)=11/13*13/15=11/15
в) = 12/19(23/15-4/15)=12/19*19/15=12/15=4/5
г) = 1/2(47/11-25/11)=1/2*22/11=22/22=1
д) = 13/27(47/26-20/26)=13/27*27/26=13/26=1/2
е) = 1*2*3*4*5*6*7*8 / 2*3*4*5*6*7*8*9 = 1/9
ж) = 2*3*4*5*6*7*8*9 / 3*4*5*6*7*8*9*10 = 2/10 = 1/5