Know addition can be done in any order when adding 3 numbers (1)
Use knowledge of numbers that add up to 10 to add 3 numbers
Know addition can be done in any order when adding 3 numbers (1)
Use knowledge of numbers that add up to 10 to add 3 numbers
Use knowledge of numbers that add up to 10 to add 3 numbers
Use knowledge of numbers that add up to 10 to add 3 numbers
