Florida B.E.S.T. MA.4.FR.2.3
The Standard
Explore the addition of a fraction with denominator of 10 to a fraction with denominator of 100 using equivalent fractions.
Florida B.E.S.T. Standards for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students rename a fraction in tenths as an equivalent fraction in hundredths. They use a model or equation to combine the hundredths and explain their reasoning.
What Mastery Looks Like
- A student can show that 3/10 equals 30/100 using a grid or equation. The student then adds 30/100 and 24/100 to get 54/100 and explains why the denominators stay the same.
Common Misconceptions
- Students may add both numerators and denominators, such as writing 3/10 + 24/100 as 27/110. They may also rename 3/10 as 3/100 instead of 30/100.
How to Assess It
- Give students 3/10 + 24/100. Ask them to draw a model, write an equivalent-fraction equation, and find the sum.
Lesson moves
Ways to Teach It
Shade tenths and hundredths on 10-by-10 grids, then combine the shaded parts and write the matching fraction equation.
Have students write an explanation for why 4/10 must become 40/100 before adding 17/100.
Play Match and Add with tenths cards, equivalent hundredths cards, and sum cards that students connect into correct sets.
Measure two ribbon pieces, one labeled in tenths of a meter and one in hundredths, then find their combined length.
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Printable MA.4.FR.2.3 Worksheet
A ready-to-print activity worksheet aligned to MA.4.FR.2.3, with an answer key for the teacher on its own page. No account needed.
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Related Standards
- MA.4.FR.1.1
Model and express a fraction, including mixed numbers and fractions greater than one, with the denominator 10 as an equivalent fraction with the denominator 100...
- MA.4.FR.1.3
Identify and generate equivalent fractions, including fractions greater than one. Describe how the numerator and denominator are affected when the equivalent fr...
- MA.4.FR.1.2
Use decimal notation to represent fractions with denominators of 10 or 100, including mixed numbers and fractions greater than 1, and use fractional notation wi...
- MA.4.NSO.2.7
Explore the addition and subtraction of multi-digit numbers with decimals to the hundredths.
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