Unni had 500 rupees with him and gave 150 rupees to Appu. Sometime later Raju borrowed 50 rupees from him. How much many does Unni have?
350
250
300
200
38 + 25 + 75 = ?
140
138
148
150
Find (x - y) - (x - y)
xy
x2
x2 + y
0
xz - yz =
(x - y)z
z(y - x)
(xy) z
xz + yz
Shorthand of writing number related facts using letters is called
Number Theory
Algebra
Expression
None of these
