human
Recognise and use efficient methods for mental multiplication Tom and Katie are discussing ways to calculate \( 28 \times 15 \) mentally Tom does \( 28 \times 5 \) and then multiplies his answer by \( 3 \) Katie does \( 14 \times 15 \) and then doubles her answer Who would get the correct answer? Neither is correct
gpt
Does not realise that multiplication can be broken down into factors