Answer: C, D, F.
the equations that are equal to 20.5 are C) 30.71 - 10.21, D) 143.5 ÷ 7, and F) 10.25 X 2.
Explanation:
A) 5.5x4 = 22
B) 10.5 + 6 + 4.5 - 1 = 20
C) 30.71 - 10.21 = 20.5
D) 143.5 ÷ 7 = 20.5
E) 10.5 ÷ 4 = 2.625
F) 10.25 X 2 = 20.5
Therefore, the equations that are equal to 20.5 are C) 30.71 - 10.21, D) 143.5 ÷ 7, and F) 10.25 X 2.