using algebraic expressions to express the following sentences(1-6)

题目

using algebraic expressions to express the following sentences(1-6)
1.Add a to b.
2.Multiply p by c.
3.Subtract e from f.
4.Divide h by 4,then add the result by u.
5.Subtract b from the product of 3 and f.
6.Add half of m to 3 times n.

答案

1.a + b
2.p x c
3.f-e
4.h/4+u
5.(3+1)-b
6.1/2m + 3n