Unit 5, Lesson 3# Adding and Subtracting Decimals with Few Non-Zero Digits

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Adding and Subtracting Decimals with Few Non-Zero Digits Know that we can decompose a base-ten unit as 10 base-ten units of lower value (e.g., 1 tenth as 10 hundredths) when subtracting decimals. Use vertical calculation to subtract decimals, decomposing base-ten units and writing additional zeros as needed. Understand that writing additional zeros after the last nonzero digit in a decimal does not change its value. Let's add and subtract decimals.