Select appropriate methods to add two 2-digit numbers.
Select appropriate methods to add two 2-digit numbers for more challenging calculations.
In-depth Investigation: Diagonal hundreds
Children use trial and improvement to place numbers in a grid to give a pair of diagonals whose sum is equal to 100.
Add a 1-digit number to a 2-digit number (pre-requisite skills)
Subtract a 1-digit number from a 2-digit number (pre-requisite skills)
Adding ‘friendly’ 2-digit numbers using partitioning (1s<100)
Making amounts using 10p coins and other smaller coins