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4.3 Extendamos las operaciones a las fracciones

Unit Goals

Students learn that a fraction $\frac{a}{b}$ is a product of a whole number $a$ and a unit fraction $\frac{1}{b}$ , or $\frac{a}{b} = a \times \frac{1}{b}$ , and that $n \times \frac{a}{b} = \frac{(n \space \times \space a)}{b}$ . Students learn to add and subtract fractions with like denominators, and to add and subtract tenths and hundredths.

Section A Goals

Recognize that $n \times \frac{a}{b} = \frac{(n \space \times \space a)}{b}$ .
Represent and explain that a fraction $\frac{a}{b}$ is a multiple of $\frac{1}{b}$ , namely $a \times \frac{1}{b}$ .
Represent and solve problems involving multiplication of a fraction by a whole number.

Section B Goals

Create and analyze line plots that display measurement data in fractions of a unit ( $\frac18, \frac14, \frac12$ ).
Represent and solve problems that involve the addition and subtraction of fractions and mixed numbers, including measurements presented in line plots.
Use various strategies to add and subtract fractions and mixed numbers with like denominators.

Section C Goals

Reason about equivalence to add tenths and hundredths.
Reason about equivalence to solve problems involving addition and subtraction of fractions and mixed numbers.

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