Unit 13 – Fractions and decimals
Adding and subtracting decimals
Use small objects and a place value chart to represent these counts: Count on in steps of 0.2 from 0 to 5. What numbers will you say? Count back in steps of 0.2 from 4.9. What numbers will you say? • •
1 Let’s look at some methods to complete the addition 0.6 + 0.2 = 0.8
0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
=
+
6 tenths
2 tenths
8 tenths
What is the same and what is different about them? Where can you see the addition fact 6 + 2 = 8?
• •
+ 2 tenths
+ 0.2
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
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04/05/2022 15:51
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