Mental Math in Junior High Author:Jack A. Hope, Barbara J. Reys, Robert E. Reys "Mental Math in Daily Life" strategies help you teach students to figure out time differences, compare prices, double recipes, cut lengths of lumber, and more, while giving students extensive, meaningful practice with decimals, fractions, and percents. Teaching notes, transparency masters, blackline masters, and answers support your work. Grade... more »s 7-9« less