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Write the answer only.

1.)(+4)+(+8)=
2.)(+6)-(+3)=
3.)(+2)×(-5)=
4.)(-5)-(-3)=
5.)(-20)÷(4)=
6.)(-36)÷(9)=
7.)(-9)-(-7)=
8.)(+6)+(+15)=
9.)(+5)-(-2)=
10.)(+4)×(-4)=