Mental calculation is a critical skill that students need to develop. First, it tests and reinforces how proficient students are with the basic mathematical facts. Students need to have a really good command of the basic math facts, such as the associative property and the distributive property, for them to apply these skills into arithmetic problem solving. Second, in a lot of standard testing, such as SAT, ACT, SSAT, ISEE, and various other math competitions such as math olympiad, speed is of the essence to stand out for better scores. One of the biggest challenges for students when dealing with these tests or competitions is they always feel time constrained. A good command of mental calculations can help them get a leg up when dealing with these tests. Third, mental calculations can also be very useful in day to day activities and in professional settings. Good command of these skills can promote your productivity and also make you look much smarter. Mental calculation can be trained by well designed math problems. This book is carefully designed to train students mental calculation skills and thus can help them gain a leg up on their mathematical skills. All these exercise problems are built up through years of tutoring and teaching that have proved to be very useful.By practicing these mental math exercises, it can not only help the student gain more proficiency in the understanding of basic math facts, but also help them stand out on all these math tests and examinations. As a matter of fact, you will notice the standard tests are just a piece of cake after you have the mental math calculation skills under your belt. This is the same book with this one: https: //www.amazon.com/Mental-Math-Practices-Haiyan-Luo/dp/B08RGYSY8D/ref=sr_1_1?crid=U43TTIF1HOPW&dchild=1&keywords=haiyan+luo&qid=1612048484&s=books&sprefix=haiyan+luo%2Caps%2C214&sr=1-1, except the interior is not colored