### Teacher resources.

Gordons subtraction bingo

Gordons subtract dartboard

Gordons horizontal subtraction using place value cards

Gordons inverse machine

Gordons loop cards

Gordons matching pairs - calculation

Gordons number facts grid

Gordons how much left

Gordons horizontal addition using place value cards

Gordons addition and subtraction using tens and ones

Gordons numberline subtraction - counting back

Gordons numberline subtraction - counting forward

NNS Counting On And Back ITP

NNS Difference ITP

NNS Number Line ITP

### Student resources.

Cuisenaire Environment: http://nrich.maths.org/4348

Big Maths digit flip challenge

Big Maths digit flip challenge pupil sheet

Big Maths magic squares

My telephone number is 83759392.
8+3+7+5+9+3+9+2=
83+75+93+92=
83+7+59+39+2=
8+37+5+93+92=
83+75+9+3+9+2=

Write down an eight-digit telephone number.
Separate the digits into one-digit or two-digit numbers and find the total.
Investigate separating the digits into other one-digit or two-digit numbers.
Find the total each time.
What is the largest answer you can get by separating the digits into one-digit or two-digit numbers and finding the total?
What is the smallest answer you can get?

Grandmas scales