standard_description: Solve word problems involving addition and subtraction of fractions referring to the same whole, including cases of unlike denominators, e.g., by using visual fraction models or equations to represent the problem. Use benchmark fractions and number sense of fractions to estimate mentally and assess the reasonableness of answers. For example, recognize an incorrect result 2/5 + 1/2 = 3/7, by observing that 3/7 < 1/2.
problem_activity: Problem 1
Arthur needs to sew 8 buttons onto his jacket. For each button, he’ll need
$$5\over 12$$
feet of thread. What is the total amount of thread, in inches, Arthur needs to sew on all 8 buttons?
Problem 2
A chef makes 37 servings of soup. Each serving is
$$2\frac {1}{4}$$
cups. How much soup, in cups, did the chef make in total?


aligns: no