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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

base 10 blocks showing 3 tensbase 10 blocks showing 2 ones

or

2 tens and 12 ones

base 10 blocks showing 2 tensbase 10 blocks showing ten onesbase 10 blocks showing 2 ones

45

is

4 tens and 5 ones

base 10 blocks showing 4 tensbase 10 blocks showing 5 ones

or

3 tens and 15 ones

base 10 blocks showing 3 tensbase 10 blocks showing ten onesbase 10 blocks showing 5 ones

68

is

6 tens and 8 ones

base 10 blocks showing 6 tensbase 10 blocks showing 8 ones

or

5 tens and 18 ones

base 10 blocks showing 5 tensbase 10 blocks showing ten onesbase 10 blocks showing 8 ones

15

is

1 ten and 5 ones

base 10 blocks showing 1 tenbase 10 blocks showing 5 ones

or

0 tens and 15 ones

base 10 blocks showing 0 tensbase 10 blocks showing ten onesbase 10 blocks showing 5 ones

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An Addition and Subtraction Worksheet - By HelpingWithMath.com

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:

Charts

Place Value Charts

Worksheets

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

 

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