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Back in the 1800’s children completed their Ray’s Arithmetic work either orally or on chalkboards or personal slates. I’ll bet these kids would have loved to have these babies. Series One workbooks teach the skills needed before beginning Ray’s: writing, counting, combining sets, comparing numbers to 20. Series Two requires use of Ray’s Primary Arithmetic and covers addition, subtraction, multiplication, and division through 9 along with time, measurement, and money problems. Series Three and Four requires Ray’s Intellectual Arithmetic. Series Three continues work in learning the facts of the times and division tables, working word problems, fractions and mixed numbers. Series Four covers basic operations on integers and fractions, equivalent fractions, least common multiplier, and ratio. Throughout the series there is a continual emphasis on learning and reciting the fact tables as well as working story problems. Workbook pages are black and white with simple illustrations in the earlier books. Periodic reviews and quizzes and a test complete each book. Each series is designed to be used in a year with each book in the series being used in one quarter. Except for Series One, all answer keys are included. ~ Janice