Summing up 2 or 3 numbers are taught in since kindergarten and primary 1.
However, in a series of numbers, a method must be used to find the sum of 20 - 50 numbers without manually adding 2 in a working and continuously adding the next one until the end of the series.
This method was taught in some schools though many choose to omit it due to lack of time within the curriculum (aka rainbow method).
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| A rainbow can be seen from one end to the other in Singapore City |
The question below will randomize with different numbers every hour.
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