Size 5.339 MB 13 seeders Added 2013-02-10 08:31:24
How to Calculate Quickly Many useful procedures explained and taught: two-column addition, left-to-right subtraction, direct multiplication by numbers greater than 12, mental division of large numbers, more. Also numerous helpful short cuts. More than 8,000 problems, with solutions.
|How to Calculate Quickly - Full Course in Speed Arithmetic.pdf||5.339 MB|