standard_description: Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)
problem_activity: Problem 1
Locate and label the following fractions on the number line.
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a.
$$12\over 6$$
b.
$$19\over 6$$
c.
$$24\over 6$$
d.
$$15\over 6$$
Problem 2
Draw a number line with endpoints 1 and 5. Label the wholes. Partition each whole into halves and label them.


aligns: no