If you _______ twenty to fifty, you get seventy.
add
Are you good at doing mathematical _________ in your head?
calculations
Are all three ________ of the triangle the same length?
sides
The water in the swimming pool is two metres ________.
deep
Someone who studies mathematics is a _____________.
mathematician
If you _________ fifteen from forty, you get twenty-five.
substract
The _________of the river is so great here that you can't see the other side.
width
These snakes can grow to a ________ of nearly three metres.
length
That building is over 200 metres ________.
high
What are the words for 0?
zero, nought, nill
