sakurauiky's answer to Clair's Primary 6 Maths Data Analysis Singapore question.
done
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30 min = 0.5 h
2 × 0.5×40÷(90-40) = 72
2 × 0.5×40÷(90-40) = 72
Date Posted:
1 year ago
Don't understand,cannot add up to 72
Printed equal number of poster
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