KS2 Primary Maths Age 9-13 - Arithmetic - Problem: - Explained

Angela has tiles of the same size. She uses four tiles to make a length of 76 cm and adds one more tile. The task is to find the total length of five tiles. First, calculate the length of one tile by dividing 76 by 4, resulting in 19 cm per tile. Then, add the length of the fifth tile to the original 76 cm, totaling 95 cm. The solution is worth two marks: one for the final answer and one for calculating the length of one tile.

What mathematical operation is used to find the length of one tile from the total length of four tiles?

Explain how the final length of 95 centimeters was obtained.