Mental Math Magic: 6212 practice problems, tips, and hacks to help you calculate faster (Math Test Prep Book 2)
by Dorothy Stein
English | 2020 | ASIN: B08LSHVMR9 | 618 Pages | EPUB | 0.2 MB
by Dorothy Stein
English | 2020 | ASIN: B08LSHVMR9 | 618 Pages | EPUB | 0.2 MB
Yes, in the age of the smartphone, a calculator app is just a few clicks away, but quick mental math saves time, energy, and makes you look smart!