We have been working a lot on number sense this year and my kiddos have done sheets like this over the last few weeks on Ways to make 10 12, 15, .....up to 100! I wanted to challenge my kiddos after weeks of number sense activities to see if they can identify the ways to make 200! They just color all of the boxes for the equations that equal 200! I use these for morning work or a math warm up. Check out my sorting centers for ways to make 10, 12, 15, 18, 20 and my worksheets like this one for ways to make 10, 12 (FREEBIE!), 15, 18, 20, 25, 30, 40, 50 and 100!