1)
(1-2+3-4):2=
-2:2=
-1
2)
(-45):(3-8)+(-2)×2=
-45:-5-2×2=
9-4=
5
3)
13+24:(-2)=
13+24:-2=
13-12=
1
4)25:(-5)-(2-7)=
25:-5-(-5)=
-5-(-5)=
-5+5=
0
5)
(-1)⁴+2×(-1)³=
1+2×(-1)³=
1+2×-1³=
1+2×-1=
1-2=
-1
6)
(-2)²-(-2)³+3²=
4-(-8)+9=
4+8+9=
12+9=
21
[tex]7) \\ \\ {2}^{8} : {( - 2)}^{6} - {( - 5)}^{0} = \\ \\ {2}^{8} : {2}^{6} - 1 = \\ \\ {2}^{8 - 6} - 1 = \\ \\ {2}^{2} - 1 = \\ \\ 4 - 1 = \\ \\ 3 [/tex]
