Lesson · Grade 4 · Mathematics
Comparing and Ordering Fractions with the Same Denominator
- Grade 4
- Mathematics
- 1 min 20 s
- British Columbia
- BC4-MA-04
Three strips of the same size are each cut into 5 equal pieces, and shading 3, 1 and 4 pieces shows that, when the pieces are all the same size, more pieces means a bigger fraction. The strips are lined up from least to greatest to give 1/5 < 3/5 < 4/5, and the video ends on the rule that with the same bottom number, the bigger top number is the bigger fraction.
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In one sentence
The question this lesson answers
Put three fifths, one fifth and four fifths in order, from least to greatest.
All three fractions have the same bottom number, 5.
Transcript
What the lesson says
Put three fifths, one fifth and four fifths in order, from least to greatest.
All three fractions have the same bottom number, 5.
Each strip is one whole, and the strips are all the same size.
Cut each strip into 5 equal parts, called fifths.
Every piece is the same size, one fifth of a strip.
Three fifths is 3 pieces.
One fifth is 1 piece.
Four fifths is 4 pieces.
The pieces are the same size, so more pieces means a bigger fraction.
One fifth has the fewest pieces, so it is the least.
Four fifths has the most pieces, so it is the greatest.
Now line them up from least to greatest.
Compare the top numbers: 1 is less than 3, and 3 is less than 4.
So from least to greatest, the order is one fifth, three fifths, four fifths.
When the bottom numbers are the same, the bigger top number means the bigger fraction.
Curriculum
Where this fits
- British Columbia, Grade 4
Mathematics, Number: ordering and comparing fractionsBC4-MA-04
Previous: Tenths and Hundredths: 3/10 = 0.3 and 45/100 = 0.45Next: Close to 0, One Half or 1? Estimating Fractions with Benchmarks
The outcomes and strands follow the British Columbia curriculum.
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