Question

part 1: read the question and choose the correct answer.

1. when we \combine\ like-terms, we ____________.

a. subtract
b. add
c. multiply

1. the math word for \letter\ is ____________.

a. constant
b. variable
c. like-term

1. \ - -\ is the same as ____________.

a. subtract
b. multiply
c. plus

1. $5(2)$ is which math operation?

a. multiply
b. divide
c. add

1. $4 + (2)$ is which math operation?

a. multiply
b. subtract
c. add

1. what do we do first in $5 + (2 - 3) + 4(4)$?

a. $4(4)$
b. $(2-3)$
c. $5+2$

1. $6 - (-2) = ________$

a. 12
b. -12
c. 8
d. 4

1. $-5(-3) = ________$

a. 15
b. -15
c. 8
d. -8

Explanation:

1. Combining like terms involves adding (or subtracting) terms with identical variable parts; addition is the core operation referenced here.
2. In math, letters represent values that can change, called variables.
3. Two adjacent minus signs are equivalent to addition (plus).
4. A number next to a parenthesized number denotes multiplication.
5. The "+" symbol explicitly indicates addition.
6. Order of operations (PEMDAS/BODMAS) requires solving parentheses first.
7. Subtracting a negative is the same as adding its positive: $6 + 2 = 8$.
8. Multiplying two negative numbers gives a positive product: $5 \times 3 = 15$.

Answer:

1. b. Add
2. b. Variable
3. c. Plus
4. a. Multiply
5. c. Add
6. b. (2-3)
7. c. 8
8. a. 15