Primary 6 · Algebra · Question type 4.1
Use a letter for the unknown number, then calculate with it in the same way as a known number.
Already watched the introduction on the chapter page? Try a different question below.
Primary 6, on the MOE Primary Mathematics syllabus.
The lesson · 2 minutes 21 seconds
Watch: a box of kaya buns nobody has counted, and 3 more beside it
Another worked example
Tin A holds h sweets. Tin B holds 8 more sweets than Tin A. Tin C holds 3 fewer sweets than Tin A. Only one of these three can be worked out exactly without being told what h is: the total number of sweets in the three tins, the number of sweets in Tin A, or how many more sweets Tin B holds than Tin C. Work out the one that can be found.
The working · Four lines
Written out in full, the way it should appear on paper.
The answer is 11 sweets.
Practise · Modelled on top school exam questions
Try it yourself first. Open the solution when you want to see the steps. No sign-up is needed. These questions are written by Mathweave, not copied from school papers.
Try it yourself
Write your own expression, then compare it with the working.
A stall baked 60 egg tarts. n egg tarts were given away, and the rest were packed equally into 6 boxes. Write how many egg tarts are in each box.
Try it yourself first. Then open the solution to compare your answer and working.
Ans: (60 - n)/6
The practice plan adds more questions and saved progress.
Next, collect like terms to write an expression in its simplest form. Collecting Like Terms →