The fifth grade, the second volume of mathematics, 10 1 page, 7890 reference answers.
Half +6 1+ 10 half, and one tenth of +2 equals 1 minus half. Add one-half minus one-third, add one-third minus one-quarter plus one-fifth 1-2 1+21-31+,one-third minus one-quarter plus one-fifth1equals 60.