Answer :
Final answer:
The combined height of Steffan and his sister is 1.25 feet.
Explanation:
To solve the word problem, 'Steffan is three and three fourths feet tall and his sister is two and two fourths feet tall. What is their combined height?', we can use the equation: three and three fourths - two and two fourths = ___.
First, we subtract the whole numbers: 3 - 2 = 1.
Next, we subtract the fractions: 3/4 - 2/4 = 1/4.
Therefore, their combined height is 1 and 1/4 (or 1.25) feet.