human
Recognise and use efficient methods for mental multiplication Tom and Katie are discussing ways to calculate \( 59 \times 4 \) mentally
Tom doubles \( 59 \) and then doubles the answer
Katie does \( 60 \times 4 \) and then subtracts \( 4 \) from the answer
Who would get the correct answer? Only Katie
gpt
Thinks that doubling and then doubling again is not the same as multiplying by 4