posted by Dana on .
Kari is 10 years old. her sister is half her age. Explain why 10 x 1/2 can be used to find her sisters age?
10/1 * 1/2 = 10/2 = 5
Do you know why this method would be used?
Because to find half of ten, you need to multiply 10/1 * 1/2
An 8-years-old boy is half his sister's age. when the boy is 1w. How old will his sister be?