<< pervious  answermath HOME  answermath en Español  Loan Calculator  Find any Print, Poster  NEXT >>  
Mental math Tips: Addition ▫ Subtraction ▫ Multiplication ▫ Division ▫ Sine ▫ Cosine ▫ Tangent  Practice on line: Addition ▫ Subtraction ▫ Multiplication ▫ Division ▫ Root ▫ Exponentiation ▫ Sine ▫ Cosine ▫ Tangent ▫ Fuzzy  
Artificial Intelligence Tutorials: Data Mining ▫ Neural Networks ▫ Fuzzy Logic ▫ Genetic Algorithms  Campos, Vectores y Sistemas De Coordenadas  
MENTAL MATH: TiPs & TrIcKs for... Subtraction I When working with these operations it's very useful to picture numbers in groups... to fragment them into smaller numbers. Try imagining blocks. For example, 14  6 = 8


Visualize a 14 as a group of 10 and a group of 4. Then subtract 6 from the first group, that now has 4. This will be add to the second group (4) that remain unchanged, that is 4 + 4 = 8 

It's a mater of playing with the numbers, if it were 19  11 = 8
The 19 would be a group of 10 (A) and a group of 9 (B), while the 11 would be a group of 10 (C) and a group of 1 (D). take off C from A, A  C = 0, take D from B, B – D = 8; the total would be 0 + 8 = 8





Home  Suggest a link  Send Comments  Disclaimer  PrivacyPolicy  Links  Help 
Copyright 2000  wgonz @ email.com  All Rights Reserved