512+312=__
512
312
212
812
The given fractions are 512 and 312.
They are like fractions because their denominator is the same.
When we add like fractions their denominator remains the same while their numerator is added.
∴512+312=5+312=812
14+04=____
(−7)×(−13)=___
77−57=____
1215−715=____
4yz(z2+6z−16)÷2y(z+8)=__