5 Klass Matematika Didakticheskii Material Stranitsa 52 V 1 Ershova -

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

: Subtract the result from the starting fraction. x=17−920=820x equals the fraction with numerator 17 minus

: Since there are 3 such parts, multiply the result by 3. 6×3=186 cross 3 equals 18 Final Result : There are 18 girls. 2. Understanding Improper Fractions Problem : For which natural values of is the fraction x6x over 6 end-fraction proper, and 10x10 over x end-fraction 6×3=186 cross 3 equals 18 Final Result : There are 18 girls

: The numerator must be greater than or equal to the denominator ( Possible values: It emphasizes: : Understanding that the top number

This page tests a student's ability to transition from whole numbers to "parts of a whole". It emphasizes:

: Understanding that the top number indicates how many of those parts are being considered.

: Find the numbers that satisfy both conditions. The numbers work for both. 3. Solving Fraction Equations Example : Solve