When a strategy is “efficient”, what does that mean? (It gets you the answer quickly and easily, with as few steps as possible. ![]() By using different strategies, we learn more about how numbers behave when we use the operations.) (Different numbers suit different strategies, and the best strategy is the one that you find quickest and easiest in that situation. Why is it a good idea to know how to solve a problem using lots of different strategies? Before they start, ensure that they understand what Alex has done in Activity One by asking them to solve 49 + 25 using his strategy. ![]() Students will need to work in pairs or small groups to complete parts of these activities. This can be solved by grouping place value numbers: 50 – 20 = 30 and 8 – 3 = 5. Another way to use this strategy is to break up both the numbers so 58 – 23 becomes (50 + 8) – (20 + 3). For example, to solve 58 – 23, the 23 could be partitioned into (20 + 3) and taken off one part at a time.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |