Adding and Subtracting whole numbers with decimals - ProTeacher Community
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##### Adding and Subtracting whole numbers with decimals

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 TxTeacher1974 Joined: Nov 2009 Posts: 52 Junior Member
TxTeacher1974

Joined: Nov 2009
Posts: 52
Junior Member
Adding and Subtracting whole numbers with decimals
10-11-2018, 07:57 AM
 #1

My students are struggling with remembering to align the decimal points when adding and subtracting whole numbers that contain decimals. Any suggestions?

 dee Joined: Aug 2005 Posts: 6,585 Senior Member
dee

Joined: Aug 2005
Posts: 6,585
Senior Member
Highlight?
10-11-2018, 03:56 PM
 #2

I make my kids highlight their decimals by drawing a straight line with the highlighted straight down. It seems to have helped.

 cathy1206 Joined: Sep 2013 Posts: 25 New Member
cathy1206

Joined: Sep 2013
Posts: 25
New Member
Decimals
10-13-2018, 05:06 PM
 #3

I like to use graph paper. I also have students write the first number with decimals. When they write the second number to add or subtract, I like for them to write the decimal first, underneath the previous decimal point, then fill in around the point. This way the decimals are lined up and the graph paper helps to keep numbers in their correct place value.

 klarabelle Joined: Jul 2008 Posts: 21,033 Senior Member
klarabelle

Joined: Jul 2008
Posts: 21,033
Senior Member

10-20-2018, 07:17 PM
 #4

I too would have them highlight the decimal point using a straight line.

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