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Primary 4 | Maths
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Ashton
Ashton

Primary 4 chevron_right Maths chevron_right Singapore

Can help faster tomorow have school. Thank you

Date Posted: 4 years ago
Views: 230

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Ivan
Ivan's answer
5 answers (Tutor Details)
1st
For part b, you could also manually add 1+2+3+... +20 to the sum of the remaining numbers and divide it by 18 but its longer and takes up more space and time.