Year 1 Lesson 14 In-class Exercise

Name ________________________

1). Evaluate these expressions for:
a = 9, b = 3, c = - 27

Rewrite the whole expression with numbers first!!
(be real careful with the minus sign on "c")

a). a + c =

b).


c).


2). Solve these equations (Find x):

a). x + 4 = 16

x = _________

b). 2x + 5 = 19

x = _________

c). 15 - x = 8

x = _________

d).


x = _________

e). 50 - 2x = 0

x = _________

f). 9x - 20 = 7

x = _________

3). Using x as your variable, write an expression for each of these phrases:

Phrase Expression
a). two times a number
 
b). seven plus a number
 
c). half of a number
 
d). a number increased by one
 
e). eight times a number minus one