Question

The fact family of numbers $1,2$, and $3$ has two _____ and two ______ equations.

• A. plus, plus
  
• B. addition, subtraction
• C. subtraction, subtraction
• D. addition, addition

Answer 1

The correct option is B addition, subtraction

The fact family of numbers $1,2$, and $3$ is made up of two addition and two subtraction equations.
$1+2=3$
$2+1=3$
$3–2=1$
$3–1=2$