1.
The equation
x
+ 3 = 5 is modeled below. To solve this problem using the model, what should you do first?
A.
Remove 3 positive counters from each side of the mat.
B.
Remove 5 positive counters from the right side of the mat.
C.
Add 5 negative counters to the left side of the mat.
D.
Add 3 positive counters to each side of the mat.
Hint
2.
If you decrease a number by 4 the result is 3. Solve
n
– 4 = 3 to find the number?
A.
7
B.
1
C.
–1
D.
6
Hint
3.
Solve
x
+ 3.57 = 6.87.
A.
3.20
B.
10.44
C.
3.30
D.
2.43
Hint
4.
Solve
x
+ 9 = 11.
A.
11
B.
9
C.
2
D.
-2
Hint
5.
Solve 1 =
p
- 16.
A.
-15
B.
16
C.
17
D.
1
Hint