Calculink

From the publisher's website: Calculink is an adventurous math game that enhances your mental arithmetic as you link numbers to reach certain totals. Points are scored on each play and extra for bravery, while strategy is used to avoid traps and to block your opponents. You learn to master several math skills through the popular Calcutest cards, which offer fun-filled exercises on a range of school-based topics. And if you are a lucky, you just might pull the right Cue Card to give you that edge on your opponents.