Simplify the following subtraction expression.
7--5
=7--5=7+5=12 (Rule: -×-=+)
Hence, 7--5=12
Simplify the following mathematical expression:
12 of 9-{13+2(7+2-1)}
Question 84 (a)
Simplify and express each fo the following in exponential form. [(37)4×(37)5]÷(37)7
-15--5
Simplify the following addition expression.
-5+-7