Write and solve a real-world problem involving the subtraction of two mixed numbers whose difference is less than 21/2

At birth, one lion cub weighs 3 3/4 pounds. Another cub in the same litter weighs 2 5/8 pounds. How much more does the heavier cub weigh?

1) To calculate the difference in weights, find: 3 3/4 - 2 5/8
2) 3 3/4 & 3 6/8 ^Write 3/4 as 6/8
4) -2 5/8 & -2 5/8 = 1 1/8
Check for Reasonableness: Round each mixed number: 3 3/4 ≈ 4;2 5/8 ≈ 3.
Then subtract: 4 - 3 = 1.
The answer 1 1/8 is close to the estimate.
So, the answer is reasonable.

Step-by-step explanation:

Scale: 1cm:250,000km

8.5 cm = 8.5*250,000

8.5 cm = 2150,000km