1) 1/5+15=15 1/5
2)3/8-1/9=27/72-8/72=19/72
3)2 1/20-6 9/40
преоьразуем дроби
2 1/20=(1+2×20)/20=41/20=82/40
6 9/40=(9+6×40)/40=249/40
82/40-249/40= -167/40= -4 7/40
5,47-(8,32-5,311)=5,47-3,009=2,461
9/13×26/27=1/1×2/3=2/3
-3 1/5×1 1/4=
преобразуем:
-3 1/5=-(1+3×5)/5= -16/5
1 1/4=(1+1×4)/4=5/4
-16/5×5/4= - 4/1×1/1= - 4
-3/8×(-8)=3
1/2:(-1/32)=1/2×(-32/1)= - 16
-2/4:8= -2/4×1/8= - 1/4×1/4= - 1/16
- 5 1/3 :(-2 2/9)=
преобразуем:
5 1/3=(1+5×3)/3=16/3
2 2/9=(2+2×9)/9=20/9
16/3:20/9=16/3×9/20=4/1×3/5=12/5=2 2/5
6^3=216
(-7)^2=49
(-1 1/3)^2=
преобразуем
1 1/3=(1+1×3)/3=4/3
(-4/3)^2=16/9=1 7/9