Online exercises on multiplication and division are for children who know number composition, addition and subtraction. We recommend you to do tasks in order from the beginning. After that you can check the knowledge of your child and start more difficult tasks up to 100 and with brackets. Before working with more complicated tasks it would be better to repeat such topics like multiplier, multiplication, dividend, devisor and quotient.
When you finish this block of tasks, you can start doing tasks on comparison, length and exponentiation.