MatchTime Lite vs SwapNumbers

Note: This is the free version of MatchTime and limits each of the four levels to only two exercises. You can unlock the full version through the in-app store. MatchTime™ Software features a programmed learning approach for students who struggle with time concepts. Four progressively difficult levels provide sequences of multiple choice exercises. Students simply find the clock that matches the large sample clock in the first three levels. Level 4 introduces the concepts of “earlier” and “later.” Uses both digital and analog clocks. Extensive record keeping tracks student progress. Level 1 focuses on matching the hour hand, while Level 2 introduces 15 minute intervals. Level 3 provides exercises using all the minutes, and Level 4 progresses to clocks that are up to four hours earlier or later than the sample.

This is a puzzle that uses addition and subtraction. Swap the numbers embedded in multiple formulas. The goal is to make everything the correct formula. It will be good training for calculation and judgment.