The problem lists the following animal masses:

Question

ScanSolve AI Tutor · Accepted Answer

My apologies, Elisa. The previous image was very faint, and I misread the animal names and masses. Thank you for providing a clearer image.

The problem lists the following animal masses:

The instruction is to "please estimate, calculate and the difference". This means we should:

Estimate each mass by rounding to the nearest ten.
- Baby zebra: $58 \text{ kg} \approx 60 \text{ kg}$
- Baboon: $34 \text{ kg} \approx 30 \text{ kg}$
- Pelican: $91 \text{ kg} \approx 90 \text{ kg}$
- Tortoise: $25 \text{ kg} \approx 30 \text{ kg}$
Calculate the estimated total mass.
$\text{Estimated total mass} = 60 \text{ kg} + 30 \text{ kg} + 90 \text{ kg} + 30 \text{ kg}$ $\text{Estimated total mass} = 210 \text{ kg}$
Calculate the exact total mass.
$\text{Exact total mass} = 58 \text{ kg} + 34 \text{ kg} + 91 \text{ kg} + 25 \text{ kg}$ $\text{Exact total mass} = 92 \text{ kg} + 116 \text{ kg}$ $\text{Exact total mass} = 208 \text{ kg}$
Calculate the difference between the estimated total mass and the exact total mass.
$\text{Difference} = \text{Estimated total mass} - \text{Exact total mass}$ $\text{Difference} = 210 \text{ kg} - 208 \text{ kg}$ $\text{Difference} = \boxed{2 \text{ kg}}$

Answer