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(1)3×5-2×7=15-14=1
(2)8×3-[(-3)(-7)]=24-21=3
(3)7×2-(-2)2=14-(-4)=14+4=18
(2)8×3-[(-3)(-7)]=24-21=3
(3)7×2-(-2)2=14-(-4)=14+4=18
Hemant0550:
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