21-(5-8)=
21-(-3)=21+3=24
3,7-(4-5,3)=3,7-(-1,3)=3,7+1,3=5
1/6-(5/12-7/12)=1/6-(-2/12)=1/6+2/12=
2/12+2/12=4/12
-13-(20-32)=-13-(-12)=-13+12=-1
-4,5-(7-9,5)=-4,5-(-2,5)=-4,5+2,5=-2
-5/8-(5/8-1)=-5,8-(-3/8)=-5,8+3/8=-2
-18-(9-5)=-18-4=-22
-0,25-(8-2,25)=-0,25-(5,75)=-025-5,75=-6
-2/9-(1-8/9)=-2/9-(1/9)=-2/9-1/9=3/9=1/3
Пошаговое объяснение:
21-(5-8)=
21-(-3)=21+3=24
3,7-(4-5,3)=3,7-(-1,3)=3,7+1,3=5
1/6-(5/12-7/12)=1/6-(-2/12)=1/6+2/12=
2/12+2/12=4/12
-13-(20-32)=-13-(-12)=-13+12=-1
-4,5-(7-9,5)=-4,5-(-2,5)=-4,5+2,5=-2
-5/8-(5/8-1)=-5,8-(-3/8)=-5,8+3/8=-2
-18-(9-5)=-18-4=-22
-0,25-(8-2,25)=-0,25-(5,75)=-025-5,75=-6
-2/9-(1-8/9)=-2/9-(1/9)=-2/9-1/9=3/9=1/3
Пошаговое объяснение: