Numbers
 

Fill in the correct answers.

 

( + 3) + 2 = 8 + (3 + 2) 6 + ( + 5) = (6 + 7) + 5
spacer.gif (42 bytes)
8 + (4 + 6) = ( + 4) + 6 2 + (6 + ) = (2 + 6) + 0
spacer.gif (42 bytes)
(7 + 9) + = 7 + (9 + 3) (+ 2) + 5 = 11 + (2 + 5)
spacer.gif (42 bytes)
+ (7 + 3) = ( 9 + 7) + 3 (+ 8) + 7 = 2 + (8 + 7)
spacer.gif (42 bytes)
(8 + 4) + 3 = 8 + (4 + ) (7 +) + 3 = 7 + (8 + 3)
spacer.gif (42 bytes)
9 + (5 + ) = (9 + 5) + 4 + (3 + 6) = (9 + 3) + 6
spacer.gif (42 bytes)
+ ( 6 + 5) = (7 + 6) + 5 ( + 3) + 7 = 4 + (3 + 7)
spacer.gif (42 bytes)
(9 + 1) + = 9 + (1 + 9) (4 + 2) + 7 = 4 + ( + 7)
spacer.gif (42 bytes)
6 + ( + 4) = (6 + 5) + 4 2 + ( + 4) = ( 2 + 11) + 1
spacer.gif (42 bytes)
+ 13 = 42 42 - 13 =
spacer.gif (42 bytes)
58 - = 32 + 32 = 58
spacer.gif (42 bytes)
16 + = 97 - 81 = 16
spacer.gif (42 bytes)
69 + = 148 148 - = 69
spacer.gif (42 bytes)
89 - = 44 + 44 = 89
spacer.gif (42 bytes)
+ 32 = 78 - 32 = 46
spacer.gif (42 bytes)
- 67 = 76 67 + = 76
spacer.gif (42 bytes)
100 - = 32

 

Solve the following equations by determining what number the variable is taking the place of in the equation.

 

b + 3 = 11

b =

4 + a = 9

a =

x + 8 = 12

x =

spacer.gif (42 bytes)
7 + a = 16

a =

3 + y =6

y =

b + 0 = 17

b =

spacer.gif (42 bytes)
a + 5 =10

a =

6 + x = 14

x =

a + 9 = 13

a =

spacer.gif (42 bytes)
4 + c =7

c =

9 + x = 19

x =

a + 13 =27

a =

spacer.gif (42 bytes)
x + 15 = 35

x =

12 + n = 24

n =

10 + a = 35

a =

spacer.gif (42 bytes)
n + 23 = 52

n =

x + 11 = 67

x =

21 + a = 44

a =

spacer.gif (42 bytes)
33 + s = 98

s =

18 + a = 36

a =

77 + x = 99

x =

spacer.gif (42 bytes)
32 + b = 43

b =

t + 14 = 28

t =

w + 18 = 29

w =

spacer.gif (42 bytes)
12 + x = 60

x =

s + 9 = 45

s =

t + 24 = 48

t =

 

Rewrite each of the following equations using the opposite operation.

x + 16 = 48

- = x

 40 + a = 42

-  = a

 25 + y = 50

- = y
spacer.gif (42 bytes)
b + 13 = 24

- = b

 16 + z = 32

-  = z

 9 + b = 18

- = b
spacer.gif (42 bytes)
7 + s = 21

- = s

 10 = 20 - n

+ = 20

 13 = 24 - a

+ = 24
spacer.gif (42 bytes)
8 = 12 - y

+ = 12

 15 = 30 - b

+ = 30

 36 = 40 - x

+ = 40
spacer.gif (42 bytes)
19 = 22 - s

+ = 22

 27 = 34 - x

+ = 34

 30 = 31 - n

+ = 31

 
 

Elementary & Middle School Lessons & Self-Correcting Tests for Children in all Subject Areas.
If you have found an error or would like to make comments on this lesson, please email us at:
MySchoolhouse.online@gmail.com
Copyright 1999-2024 by Educational Designers, LLC.  All rights reserved.
Lessons & Tests in Math, Reading, Spelling, Science, Language, and Social Studies.

"This site uses cookies from Google to deliver its services and analyze traffic. Your IP address and user-agent are shared with Google along with performance and security metrics to ensure quality of service, generate usage statistics, and to detect and address abuse."
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
WORK SPACE