standard_description: Write simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating them. For example, express the calculation “add 8 and 7, then multiply by 2” as 2 × (8 + 7). Recognize that 3 × (18932 + 921) is three times as large as 18932 + 921, without having to calculate the indicated sum or product.
problem_activity: Problem 1
For each of the following problems,
Decide if it can be solved using multiplication or division. Explain your thinking.
For each word problem that can be solved using multiplication or division, represent it using an equation with a letter standing for the unknown quantity.
Solve.
a.   Nadeem is reading a book. It takes him 7 minutes to read each page. How many minutes will it take for Nadeem to read 10 pages?
b.   Helen spent some money on her 3 grandchildren at the fair. If she spent a total of $12, how much did she spend on each grandchild?
c.   Kiara is making saris. She has 30 meters of fabric and needs 5 meters to make each sari. How many saris can Kiara make?
Problem 2
For each part below, write a word problem that can be represented with the given expression.
a.
$$4 \times 6$$
b.
$$15 \div 3$$


aligns: no