Explain why using placeholder zeros to the right of a decimal does not change the value of the number.

Adding zeros to the right of a decimal is the same as adding zero hundredths, zero thousandths, etc., which does not change the overall value.

Adding And Subtracting Decimals Lesson Plan for Grade 5th Grade

I can add and subtract decimals using models and strategies based on place value.

1
When adding or subtracting decimals, the first step is to line up the decimals to ensure that all the places are lined up correctly.
2
Placeholder zeros can be added to the right of a decimal without changing its value; this can help to line up the numbers and avoid mistakes when adding or subtracting.
3
When subtracting decimals, remember to borrow if the top digit is smaller than the bottom digit; avoid the common mistake of just dropping the bottom number.