These games are thought provoking and very engaging. They encourage discussion of place value, mental calculations and estimation, alongside valuable strategic mathematical thinking.
These games follow on from Nice and Nasty
Working in teams of two, set the students off on playing Game 1. Depending on your aims for the lesson, offer the simple or more complicated scoring system.
Why are some cells more significant than others?
How do you decide which targets are appropriate?
What are effective strategies for placing the numbers?
If pupils are struggling, they might benefit from trying Dicey Addition. This is a simpler version that uses fewer cells in each game.
Perhaps provide students with number cards that they can move around the grid to consider different options.
Pupils who find estimation difficult could use calculators to check their estimates.
Choose the easiest scoring system or allow calculators for scoring the more difficult version.
Allow pairs of students to play against other pairs, so that they can support each other.