Expanded addition: 3-digit numbers - 2
In-depth Investigation: Next Door Additions
Children add pairs of three-digit numbers and look for patterns in the digital roots of the answers.
Mental addition of 2-digit numbers
In-depth Investigations: Dicey Addition
Use dice to generate two 2-digit numbers. Find the total. Whoever has the total closest to 100 wins. Dicey Addition from nrich.maths.org.
Solve scaling problems
In-depth Investigation: Follow the Numbers
Adapt this investigation to find the digital root and multiply by 4 or 10. Keep following this rule and see what happens. Investigate the patterns when you start with different numbers. Follow the Numbers from nrich.maths.org.
Partition 3-digit numbers; place on a line
In-depth Investigation: Counter Place Value
Children place counters on a place value grid to make 3-digit numbers and then use logic to ensure they have made all the combinations.
Revise multiplication and division facts
In-depth Investigation: Ordering Cards
Children use their knowledge of times table facts to find the order of a set of loop cards. Ordering Cards from nrich.maths.org.
Expanded addition: 3-digit numbers - 1
In-depth Investigation: Expanded Elevens
Children use base 10 equipment to create 3-digit numbers to add using expanded column addition.