Priscilla Ng's answer to blessed's Primary 6 Maths Measurement Singapore question.

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Priscilla Ng
Priscilla Ng's answer
806 answers (Tutor Details)
1st
The outer 1-cm cubes are painted red.

The lines are drawn to indicated which painted layers are being counted.

The total number of cubes excluding the painted cubes will be those not painted at all.