【實用教育app】Mental Math - Part 1|最夯免費app-綠色工廠好玩App

Mentally multiply and divide by 2,4,5,25 and 50! NO paper, pencil or calculator required. It all starts with mastering doubling and halving! That's it! Practice and master multiplying and dividing two-digit numbers by 2 ALL IN YOUR HEAD. You'll use this skill to then multiply and divide by 4 (just double or half twice). To multiply by 5, just put a zero on the end and half it! So 24 x 5 is just 240 halved or 120! Master these skills mentally through PRACTICE! You'll be given random timed problem sets. Problems set are in three levels, Beginner, Intermediate and Advanced. As you progress from one level to the next, problems become more challenging, but your mastery (mentally) increases. A progress chart is maintained to you can track and monitor progress. Not only will you be able to mentally perform these operations, your familiarity with basic numbers will increase immensely. Great for younger children that are "bored" with the math at school. A real challenge! Give it a try today!