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DANEMATHICS
www.danemathics.com
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VIDEO WORKSHEET
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Video: Adding & Subtracting Common Fractions · Grade 8–9
These are the questions worked through in the video. Pause after each one, do it yourself, then check against the video.
These are the questions worked through in the video. Pause after each one, do it yourself, then check against the video.
- Find the LCM of the two denominators.
- Draw one long division line and write the LCM underneath.
- Ask: how many times does each denominator go into the LCM? Multiply that answer by its numerator, above the line.
- Bring the + or − down and work out the top.
SECTION A — ADDING
1.
Calculate:3/8 + 1/4
(2)
2.
Calculate:5/6 + 2/9
(2)
3.
Calculate:2/5 + 3/10
(2)
4.
Calculate:4/7 + 13/14TRY IT YOURSELF
(3)
SECTION B — SUBTRACTING
5.
Calculate:2/3 − 6/4
(2)
6.
Calculate:3/2 − 6/4
(2)
7.
Calculate:9/18 − 2/9
(2)
8.
Calculate:2/4 − 3/6TRY IT YOURSELF
(3)
TOTAL: 18