What each digit is worth
In 352 the 3 is worth three hundred, not three. Seeing that, and writing it, is the base of adding and subtracting with bigger numbers, regrouping included. These sheets go from counting blocks to writing numbers in expanded form, one small step at a time.
Three tasks
- Blocks. Count the flats, rods and cubes, then write the number.
- Tens and ones. 47 = 4 tens 7 ones; 352 = 3 hundreds 5 tens 2 ones.
- Expanded form. 352 = 300 + 50 + 2.
Next steps
Once place value is secure, move on to two-digit addition andsubtraction with regrouping.
Common Core standards
- 1.NBT.B.2Understand the two digits of a two-digit number as tens and ones.
- 2.NBT.A.1Understand the three digits of a three-digit number as hundreds, tens and ones.
- 2.NBT.A.3Read and write numbers to 1000 as numerals and in expanded form.
Summaries in our own words; see the Common Core State Standards for the full text.
