ISBN-13: 9781541904255 / Angielski / Miękka / 2017 / 64 str.
Yes, these exercises should be done in one minute So take out your clock and set the time. The reason we're adding time pressure to these exercises is to check if your child really understands multiplication and division. If so, then these theories should become deeply embedded in the consciousness that they're almost natural for your child to solve them. Buy a copy now