(-28)÷(-28)=_____.
Solving the example
(–28)÷(–28)=(-28)(-28)=1∴(–28)÷(–28)=1
The value of (7C0+7C1)+(7C1+7C2)+...+(7C6+7C7)
(−28)÷(−28)= ___
28*(-48)+(-48)*28