A set of ten challenges, each with 42 questions. The first three challenges focus on adding 2-digit numbers. The next three challenges focus on subtracting 2-digit numbers (with and without exchanging). The final four challenges focus on a mixture of both addition and subtraction with 2-digit numbers. Also includes answer sheets.
 
This resource can be used with a Connect Four game. If the answer is even, children place a yellow counter. If the answer is odd, children place a red one. The children can then get the answer sheet to self-mark their work.
 
Alternatively, children could colour in the answers yellow or red if they don't have access to Connect Four.
 
20 pages in total - 10 pages with the questions and 10 with the answers.