<span>Упражнение 530.
Вычислите
1) 21-(5-8)= 21-(-3)=21+3=24
2) 3,7- (4 - 5,3) = 3,7 - (-1,3)=3,7+1,3=5
3)
- ( </span>
-
) =
- (-
) =
+
=
= <span>
4) -13-(20-32)= -13-(-12)= -13 +12 =-1
5) -4,5-(7-9,5) = -4,5 - (-2,5) = -4,5+2,5= -2
6) - </span>
- (
-1) = -
- (
-
) = -
- (-
) = -
+
= -
=- <span><span>
</span>7) -18-(9-5)=
-18 -4= -22
8) -0,25-(3-2,25)= -0,25 - 0,75 = - 1
9) -
- ( 1 - </span>
)= -
- (
-
) = -
-
= -
= -