Number and operations in base ten
5.NBT.A.1
Recognise that a digit in one place is worth ten times what it is worth to its right and a tenth of what it is worth to its left.
Practice for this standard
-
Place value
Tens and ones through millions and thousandths, expanded form, and reading numbers out loud correctly.
-
Decimals
Decimal place value, comparing, rounding, and the four operations with decimal points lined up.
Official wording and the full standard: CCSS.MATH.CONTENT.5.NBT.A.1