Every die follows a fixed rule - top + bottom is always 7.
If a die shows a 5 on top, a 2 is hidden underneath (because 5 + 2 = 7).
With several dice, add up the hidden bottom faces.
Example
- 2
For parents
What does this exercise practice?
Dice-bottom-face practices a die's opposite-sides rule (top + bottom = 7) as spatial reasoning rather than plain calculation - the child discovers a fixed rule and computes with the hidden, not the visible, number.
Common pitfalls
Some children keep calculating with the visible number instead of finding the opposite side first. It helps to say out loud which number is hidden underneath before doing any math.
How to practice at home
Check it with a real die - roll a number on top, look underneath, and see if top + bottom really adds up to 7.
Related: Dice, Read dice, Match dice