Here is a multiplication game to help you with your times-tables. You are able to choose the tables you would like to work on before starting the game. I wonder who can get the highest score.
When multiplying by 4 you can use the strategy of double-double. For example, if the problem was 4 x 15, you double 15 (30) and then double 30, which equals 60.
Try solving some of these by using the double-double strategy and post your working out and answers in a comment under this post.
1) 4 x 18
2) 4 x 34
3) 4 x 62
4) 4 x 223