StudyChamp Blog
Triangle Ladder
A number pyramid turned upside down. Combine each pair of neighbouring numbers to make the row below, then repeat until one number is left, and give that number as the answer.
What it trains
- Chains of mental calculations
- Holding intermediate results in mind
- Addition and subtraction fluency
Questions
How does subtraction work in the ladder?
With the − sign, take the right number away from the left one. The numbers are chosen so the results never go below zero.