(−28)÷(−28)= ___
6
2
1
-1
Division is the inverse of multiplication. For any two numbers x and y, (-x)(-y) = xy
(−28)÷(−28)=1 [-28 = 1 × -28]
28*(-48)+(-48)*28
The value of (7C0+7C1)+(7C1+7C2)+...+(7C6+7C7)