Lesson Plan

Express a fraction with denominator 10 as an equivalent fraction with denominator 100 by multiplying both the numerator and the denominator by 10

Explain why multiplying the numerator and denominator by 10 produces an equivalent fraction, using a 10x10 grid model as justification

Add two fractions where one has denominator 10 and the other has denominator 100 by first converting the tenths fraction to hundredths, then adding like denominators

Represent tenths and hundredths on a 10x10 grid and use the grid to verify addition results

Apply the tenths-to-hundredths conversion in money and measurement contexts (dimes/pennies, meters/centimeters)

4.NF.C.5

4.NF.C.5: Express a fraction with denominator 10 as an equivalent fraction with denominator 100, and use this technique to add two fractions with respective denominators 10 and 100. For example, express 3/10 as 30/100, and add 3/10 + 4/100 = 34/100.