【實用教育app】Mathematricks HD|最夯免費app-綠色工廠好玩App

Do you want to do quick calculations for large numbers ? Are you getting less grades in maths ? Do you work in financial business ? Do you want to be a trader ?If YES, this is the perfect app for you !This app contains great tricks to do calculations such as multiplication, squaring, division, subtraction, addition easily and quickly. Use this app as a pocket guide to improve your calculation skills. Boast and show your newly acquired skills to friends and colleagues !The app also contains quiz to practice and test your skills. So go head buy the app, learn the tricks and practice your newly acquired skills ! Trick : Multiplication by 61.Add half of the neighbor to each digit.2.If the starting digit is odd, add 5.Example:  6 × 357 = 2142Working right to left, 7 has no neighbor, add 5 (since 7 is odd) = 12. Write 2, carry the 1. 5 + half of 7 (3) + 5 (since the starting digit 5 is odd) + 1 (carried) = 14. Write 4, carry the 1. 3 + half of 5 (2) + 5 (since 3 is odd) + 1 (carried) = 11. Write 1, carry 1. 0 + half of 3 (1) + 1 (carried) = 2. Write 2.