5 Klass — Matematika Didakticheskii Material Stranitsa 52 V 1 Ershova

: Treating fractions as balanced "math sentences" where both sides must remain equal.

: Usually involving the total distance or amount after several parts are consumed or traveled. Step-by-Step Analysis of Key Problems 1. Calculate a Part from a Whole Problem : In a school, there are 48 fifth-graders. 38three-eighths of them are girls. How many girls are in the fifth grade? Divide the total by the denominator : To find one part ( 18one-eighth ), divide the total number of students by 8. 48÷8=648 divided by 8 equals 6 : Treating fractions as balanced "math sentences" where

x=17−920=820x equals the fraction with numerator 17 minus 9 and denominator 20 end-fraction equals 8 over 20 end-fraction : (which can be simplified to 25two-fifths if required). Summary of Educational Concepts Calculate a Part from a Whole Problem :