By 'extra' worksheets do you mean you meant to order 2 workbooks for 2 kids, but only ordered 1?

If that's the case, then yes you can probably make do with just having both kids work out of the same book and put their answers on paper.

If you mean that you didn't order a worksheets book at all, then you do need one. You can't write the answers on a sheet of paper when you don't know what the questions are.

No, LOL, I have one, just not one for each child. Thanks.