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Arithmetic videos based on Singapore Math. Topics include: Introduction to addition. Multiple visual ways to represent addition. Adding a 2 digit number to a 1 digit number. Introduction to carrying. Adding decimals Subtraction of multi-digit numbers involving borrowing An explanation of why (not how) borrowing/regrouping works when subtracting numbers Subtracting decimal numbers 2 examples of multiplying a 3 digit number times a 2 digit number. 1 example of multiplying a 3 digit number times a 3 digit number. Multiplying decimals Dividing a two digit number into a larger number Dividing decimal numbers