Complete the sentences.

1. Eight multiplied by seven is fifty-six.
2. The were in favour of the new airport; about 80%, I think.
3. A small did not support the idea, but it was only 5%.
4. I’m not very good at arithmetic. I always have to use a .
5. When I tried to add all the numbers, I couldn’t it out.
6. I can do simple calculations, but I get if the numbers are very big.