Number Strings Resources

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How to Build a Number String (From Ontario Education)

Strings are usually made up of pairs or groups of computations that are related. “Helper” computations (questions that students are able to answer easily) are followed by a computation that can be solved by applying the focus strategy. The following example shows the structure of a string that focuses on the adding-on strategy. In this case, the strategy involves adding the tens from the second addend first, and then adding on the ones.