(−7)×(−13)=___
91
−91
−20
20
Here, both the given integers are negative. Thus, their product will be positive. ∴(−7)×(−13)=+91
(−7)×(−13)+(17)×(−13)=__
−13+(−69)+57−(−89)−(53+(−49))=___
77−57=____
1215−715=____
14+04=____