KS2 Primary Maths Age 13-17 - Calculations: Word Problems - Explained

The video tutorial explains how to solve a problem involving a stack of 20 identical boxes that is 140 centimeters tall. Stefan removes three boxes from the stack, and the task is to determine the new height of the stack. The solution involves calculating the height of one box by dividing the total height by the number of boxes, then subtracting the height of the removed boxes from the original stack height. The final answer is 119 centimeters, with marks awarded for both the correct answer and the method used.

What is the total height of the stack of 20 boxes?

• 120 centimeters

• 140 centimeters

• 160 centimeters

• 180 centimeters

How many boxes does Stefan remove from the stack?

• 5 boxes

• 4 boxes

• 2 boxes

• 3 boxes

What is the height of a single box?

• 5 centimeters

• 8 centimeters

• 6 centimeters

• 7 centimeters

How much height is removed from the stack when 3 boxes are taken off?

• 18 centimeters

• 21 centimeters

• 20 centimeters

• 19 centimeters

What is the new height of the stack after removing 3 boxes?

• 119 centimeters

• 118 centimeters

• 117 centimeters

• 120 centimeters