These word problems are designed for students to discover the best time to use the take away parts strategy or adding up strategy.
Some numbers are close together (19 and 21) to encourage adding up and finding the difference. Others are far apart to encourage take away parts.
If you explore different strategies for adding and subtracting in your class and your students share their thinking and strategies, this is a great activity for you! Especially if your students need to decide when strategies are most efficient (depends on the numbers involved).
Solve these problems in 2 ways. One MUST be take away parts. The other strategy is your choice.
1. ____________ has 15 stickers. She gave 13 stickers to ______________. How many stickers does __________ have left?
**The blanks are for you to write in the names of your students. This way it is more relevant to your class and they are motivated to solve them!
Question on the bottom for share time--
Share time: When was taking away parts an efficient (easy, fast, clear) strategy?
When was it not very efficient?
There are 3 differentiated sheets for your different learners.