Do NOT use a mouse.
Multiply x * . () by four:
4 groups of or 4 lots of
Quadruple the number
Skip count in 4s
Double the number then double again
Learn your 4 times tables
Divide ÷ / by four:
How many times does 4 go into
Break into 4 groups
One quarter of
Skip count in 4s and count the 4s
Keep subtracting 4 from the number 12-4-4-4=0 so 4 goes into 12 exactly 3 times
Reverse your 4 times tables 3x4=12 so 12÷4=3 and 12÷3=4
Add + four:
Count 4 on from the original number
Learn addition rules e.g. 5+4=9 so 65+4=69
Take - four:
Count 4 back from the original number
Learn subtraction rules e.g. 7-4=3 so 67-4=63
Number in grey (left) x number in grey (top) = number in white OR number in white ÷ number in grey = other number in grey.
Number in grey (left) + number in grey (top) = number in white OR number in white - number in grey = other number in grey.