Question

practice problems
3
from unit 5, lesson 13
in each equation, the ? represents an operation. which operation makes each equation true?
a. $48?(-8)=(-6)$
b. $(-40)?8=(-5)$
c. $12?(-2)=14$
d. $18?(-12)=6$
e. $18?(-20)=-2$
f. $22?(-0.5)=-11$

Explanation:

Step1: Test operations for a

Test division: $\frac{48}{-8} = -6$. This matches the right-hand side.

Step2: Test operations for b

Test division: $\frac{-40}{8} = -5$. This matches the right-hand side.

Step3: Test operations for c

Test subtraction: $12 - (-2) = 12 + 2 = 14$. This matches the right-hand side.

Step4: Test operations for d

Test addition: $18 + (-12) = 18 - 12 = 6$. This matches the right-hand side.

Step5: Test operations for e

Test addition: $18 + (-20) = 18 - 20 = -2$. This matches the right-hand side.

Step6: Test operations for f

Test multiplication: $22 \times (-0.5) = -11$. This matches the right-hand side.

Answer:

a. $\div$ (division)
b. $\div$ (division)
c. $-$ (subtraction)
d. $+$ (addition)
e. $+$ (addition)
f. $\times$ (multiplication)