Primary 6 · Algebra · Question type 4.3
Replace every occurrence of the letter with the given number, rewrite the full expression, then calculate.
Try the question yourself, or watch the lesson first.
Primary 6, on the MOE Primary Mathematics syllabus.
The lesson · 2 minutes 14 seconds
Watch: 4 tables of chairs and 5 more against the wall, when n is 6
Another worked example
Two rods are exactly the same length. The first rod is 18a cm long and the second rod is 12b cm long. The number b is 8 more than the number a. Find the value a represents.
The working · Four lines
Written out in full, the way it should appear on paper.
The answer is 16.
Practise · Modelled on top school exam questions
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Try it yourself
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Find the value of (8y + 12)/4 when y = 5.
Ans: 13
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Next, build an expression from a table. Building an Expression from a Table →