You can add or subtract numbers in lots of different ways. You can use number lines, number bonds, fact families, 10 squares and counters, or even just writing the numbers down. Sometimes it is faster ...
The following are three examples of calculation strategies students might discover on their own if they were taught standard algorithms first and allowed to master them before moving on. Common Core ...
Depending on your age, you’ll remember the traditional, straight forward method (algorithm) of doing a three-digit subtraction calculation, like 352 – 164, to arrive at the correct answer of 188. That ...
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