![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
\
The expression is ![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=da86d93323730333bb5831bf26072b66.png\")
Place value chart for 2.2 and 3.8.
\ \ \
![\"\"](\"/userfiles/image/Library/placeavaluechart.gif\")
line up the decimal points and draw a line below the numbers.
\Annex zero to align the numbers.![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8e7b3b60932c6723455b293dede7d051.png\")
\ \
![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
Next find the sum of the tenths digit.
\The sum of the tenths digit =![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=da1daf39cdedd4eabd8b2147db07a2eb.png\")
.
![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a57f451009b248a8c26973eda6c9472a.png\")
![\"\"](\"/userfiles/image/steps_images/step3.JPG\")
Next find the sum of the ones digit.
\The sum of the ones digit =![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=81283a72363939ee18a2c1530ed4f7c4.png\")
.
![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=44ba6f71dca1d6746349646001ccd362.png\")
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![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The sum is -6.
\