➕ 5th Grade Math · Unit 5

Adding and Subtracting Fractions

14 short narrated lessons in 3 chapters, each with pictures, a quiz with a hint and a second try, and an explanation for every answer.

Standards: 5.NF.A.1 5.NF.A.2 5.MD.B.2

5th Grade Math · 8 units

What your child will learn

Finding a Common DenominatorRewrite two fractions with unlike denominators as equivalent fractions with a common denominator.
Adding Fractions with Unlike DenominatorsAdd fractions with unlike denominators by first making equivalent fractions with a common denominator.
Subtracting Fractions with Unlike DenominatorsSubtract fractions with unlike denominators by first making equivalent fractions with a common denominator.
Adding and Subtracting Mixed NumbersAdd and subtract mixed numbers with unlike denominators, regrouping when needed.
Unlike Denominators Review ReviewReview adding and subtracting fractions and mixed numbers with unlike denominators.

Estimating with Benchmark FractionsEstimate fraction sums and differences by rounding each fraction to zero, one half or one.
Fraction Story ProblemsSolve word problems that add or subtract fractions with unlike denominators using models or equations.
Does That Answer Make Sense?Use benchmark fractions to decide whether a fraction answer is reasonable, like seeing that two fifths plus one half is not three sevenths.
Fraction Problem Solving Review ReviewReview solving fraction word problems and checking with estimates.

Making a Fraction Line PlotMake a line plot to show a set of measurements in halves, fourths and eighths.
Solving Problems with Line PlotsAdd and subtract fractions from a line plot to answer questions about the data.
Sharing Equally with a Line PlotFind the amount each would get if the total in a line plot were shared equally, like pouring all the water into beakers evenly.
Line Plots Review ReviewReview making and using line plots with fraction data.
Unit 5 Test: Adding and Subtracting FractionsShow what you learned in the whole unit (Fractions with unlike denominators, Fraction problem solving, Line plots with fraction data) by answering mixed questions.

From the lesson “Finding a Common Denominator”

Which is a common denominator for 1/4 and 1/6?

Show the answer

12. 12 is a multiple of both 4 and 6, so it works as a common denominator.

Hint kids see after a wrong try: “List multiples of 4 and of 6. Which number is in both lists?”

Narrated lessons, pictures and quizzes for every grade from K to 8. Works offline.