ISBN-13: 9781628841770 / Angielski / Miękka / 2013 / 36 str.
ISBN-13: 9781628841770 / Angielski / Miękka / 2013 / 36 str.
No matter how simple it may be, solving mathematical equations can be a challenge for quite a number of persons. Through his book titled "Secret Of Mental Math Arithmetic: 70 Secrets To Super Speed Calculation & Amazing Math Tricks", Jason