# Getting Ready To Subtract - Decompose a Ten

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 Note: There is a follow-on worksheet here that uses the decomposing of a ten to help with subtraction. i.e. subtraction with regrouping. Complete the sentences below to show how many tens and how many ones there are in the numbers. Use the base ten blocks to help. The first one is done for you.
 32 is 3 tens and 2ones  or 2 tens and 12 ones   45 is 4 tens and 5 ones  or 3 tens and 15 ones   68 is 6 tens and 8 ones  or 5 tens and 18 ones   15 is 1 ten and 5 ones  or 0 tens and 15 ones   ------ Note: The Information below this point will not be sent to your printer --------

## Related Resources

The various resources listed below are aligned to the same standard, (1NBT02) taken from the CCSM (Common Core Standards For Mathematics) as the Place value Worksheet shown above.

Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:

• 10 can be thought of as a bundle of ten ones - called a "ten."
• The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
• The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).

### Worksheet

#### Worksheet Generator

Similar to the above listing, the resources below are aligned to related standards in the Common Core For Mathematics that together support the following learning outcome:

Understand place value