The   DinaMath   series of text books was designed to respond to the failings of the     modern   American   math   curriculum   and   to     provide   parents with a supplement     (or a replacement)   to   ensure   that   their   children   learn   basic   mathematics   well     enough   to   succeed in algebra,   trigonometry, and calculus.   A good   knowledge of     arithmetic is essential for these advanced subjects; also,   arithmetic is the part   of math     that is most useful in everyday life.   Clear, coherent   explanations,   plentiful   examples     and practice   problems,   and amusing   pictures   make these books useful and fun for     students.         The third book in the series,   "Equations are Easy" covers basic equations and word     problems involving equations. The idea of a   variable is   first   introduced, and then the     book proceeds to simple one-step equations.   After a short   excursion into integers, to     ensure that the   student hasn't forgotten them, the   book goes on to equations involving     integers. The equations   increase in   complexity until the   student is   solving multi-step     equations using the distributive property, with the variable on both sides of the equation.     Each type of equation is accompanied by word problems. The book also covers ratios,     proportions, and   percents, and word   problems involving these concepts. Finally, the     last chapter covers simple exponents and square roots.         The book   consists   of two   parts: a   Textbook and a   Workbook. The textbook     contains   explanations,  examples, and a few practice problems for   each lesson. The     workbook   contains problem   sets to   accompany each lesson and answers to all the     problems.