Test PracticeT
C 44. FIND THE ERROR Aisha is finding b + 5 = - 8.
Find her mistake and correct it.b + 5 = –8
+ 5 + 5
b = –3- CHALLENGE Suppose x + y = 11 and the value of x increases by 2. If their
sum remains the same, what must happen to the value of y? - OPEN ENDED Write an addition equation and a subtraction equation that
have 10 as a solution. - E WRITE MATH Write a problem about a real-world situation that
can be represented by the equation p - 25 = 50.
Lesson 1D Addition and Subtraction Equations 213- The Oriental Pearl Tower in China is
1,535 feet tall. It is 280 feet shorter
than the Canadian National Tower in
Canada. Which equation can be used to
find the height of the Canadian National
Tower?
A. 1,535 + h = 280
B. h = 1,535 - 280
C. 1,535 = h - 280
D. 280 - h = 1,535 - Which of the following statements
is true concerning the equation
x + 3 = 7?
F. To find the value of x, add 3 to
each side.
G. To find the value of x, add 7 to
each side.
H. To find the value of x, find the
sum of 3 and 7.
I. To find the value of x, subtract 3
from each side.
50. The model represents the equation
x - 2 = 5.
Y1
1
11
1- 1
- 1
=How could you find the value of x?
A. Add two positive counters to each
side of the equation mat.
B. Add two negative counters to each
side of the equation mat.
C. Add five positive counters to each
side of the equation mat.
D. Add five negative counters to each
side of the equation mat.- GRIDDED RESPONSE What is the
solution to the equation below?
- 8 = x - 15
204_213_C04L1_895130.indd 213 12/31/09 3:56 PM