Fractions and Decimals
½ of 8 =
¼ of 8 =
½ of 20 =
⅕ of 20 =
⅕ of 30 =
⅓ of 21 =
1/10 of 100 =
1/10 of 10 =
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Show 1/6 of this shape
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Show 1/3 of this shape
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Show 2/6 of this shape
Equivalent Fractions
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Show ½
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Show 2/4
What do you notice about these fractions?
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Show 2/8
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Show ¼
What do you notice about these fractions?
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Show 2/10
Show 2/5
What do you notice about the numbers in each of these?
Equivalent Fractions
What could ½ also be the same size as? What if we times the numbers by something else?
The equals sign =, also means the same as.
¼ = ?
⅓ = ?
⅕ = ?
⅙ = ?
2/10 =?
What are 4 equivalent fractions for 1/10?
½
2/4
I can see that ½ is the same as 2/4 when I look at this image.
Another way to work it out is with the numbers!
½
1 x 2 = 2
2 x 2 = 4
2/4
We can also express 1/10 as 0.1
Just like before 10/10 or 10 lots of 0.1 make 1 whole.
How many tenths are here? 0.
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
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How many tenths are here? 0.
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What is 0.2 + 0.6 ?
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What is 0.4 + 0.8?
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0.7 + 0.2=
0.6+ 0.8 =
0.1 + 0.8 =
WALT: Add and subtract decimal fractions
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A decimal fraction is a fraction where the denominator is a power of 10 (10, 100, 1000…)
1/10 + 4/10 =
6/10 - 4/10 =
56/100 - 20/100 =
23/100 + 40/100 =
1/10 = ?/100
1/10 + 20/100 =
1/10 + 15/100 =
0.1 + 0.4 =
0.6 - 0.4 =
0.51 - 0.2 =
0.23 + 0.40 =
0.2 + 0.25 =
0.4 + 0.45 =
0.6 + 0.3 =
4/10 can also be written as 0.4