For those taking PSLE, please take note of this important update regarding the difference between arrow and equal sign. Forward this to your friends taking PSLE!
Basically, I think MOE is trying to instill students to be mathematically correct. (See update below: Marks will not be deducted in most cases but proper usage is highly encouraged.)
E.g. 100%=40 is wrong as 100%=100/100=1 technically. Similarly, 10 men = 40 hours is wrong as the units do not match (nor make sense).
Trying to enforce “units” instead of “u”, and banning “10 units -> 20” is a bit strict though, in my opinion.
In response to Mothership.sg queries, a Ministry of Education spokesperson clarified that the above information was not provided by the ministry.
The information above was originally sourced from the website of a private tuition centre, whose sources are currently unverified.
While the respective uses of the arrow and equal signs are accurate in the infographic, the MOE spokesperson said full credit will still be awarded to the student even when the signs are used interchangeably, as long as the student demonstrates a full understanding of the question.
Proper use of arrow and equal signs are, nonetheless, encouraged.