Posted by viri on Thursday, December 15, 2011 at 8:07pm.
Sum and difference problems can be readily solved without algebra by the following:
bigger number = (sum+difference)/2
smaller number = (sum - difference)/2
Example, since there are more girls than boys, so
number of girls = (35+11)/2 = 23
number of boys = (35-11)/2 = 12
Related Questions
Math - Mrs coopers 5th grade class has 11 more girls than boys. There are 35 ...
math - Math word problem: There are 25 students in Mrs. Roberts 3rd grade class...
Math - Mrs.Smith's class has 12 girls and 8 boys. What percent of he class ...
3rd Grade Math - There are 25 students in Mrs. Roberts 3rd grade class. There ...
Math 156 - The ratio of girls to boys in Mr. Maddox's class of 20 students ...
Math - If the ratio of girls to boys on the swim team is 2:3, which of these ...
MATH - In Jessica's art class, the ratio of girls to boys is 3:2. If there ...
math - A class of 25 students has 10 boys. Three boys have braces and 4 girls ...
layla - Mrs. Baker has to choose 2 students to lead the class field trip. If she...
Maths - There are 40 pupils in a class. There are 10 more boys than girls. When ...
For Further Reading
