standard_description: 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. (Students who can generate equivalent fractions can develop strategies for adding fractions with unlike denominators in general. But addition and subtraction with unlike denominators in general is not a requirement at this grade.) For example, express 3/10 as 30/100, and add 3/10 + 4/100 = 34/100.
Grade 4 expectations in this domain are limited to fractions with denominators 2, 3, 4, 5, 6, 8, 10, 12, and 100.
problem_activity: Problem 1
a.   Kyle has 6 Skittles.
$${{1\over3}}$$
of them are red. How many of Kyle's Skittles are red?
b.   Samantha also has 6 Skittles.
$${{2\over3}}$$
of them are red. How many of Samantha’s Skittles are red?
Problem 2
a.   Find the value of each of the following.
|  i.                                 $$\frac{1}{3}$$                                of 9   | ii.                                 $$\frac{2}{3}$$                                of 9  |
|-------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------|
| iii.                                 $$\frac{1}{5}$$                                of 10 | iv.                                 $$\frac{4}{5}$$                                of 10 |
|  v.                                 $$\frac{1}{4}$$                                of 12  | vi.                                 $$\frac{2}{4}$$                                of 12 |
b.   What do you notice about the solutions to the computations in the leftmost column of the table? What do you wonder?
c.   What do you notice about the solutions in each row of the table? What do you wonder?
Problem 3
a.   Mrs. Pham has 8 apples. She wants to give
$${{3\over4}}$$
of the apples to her students. How many apples will her students get?
b.   In a class of 24 students,
$${{5\over6}}$$
of them are boys. How many boys are in the class?


aligns: no