1. 1 49/60 hours
solution:
1. Given ⅔ - hours spent for Math homework on
Monday
¾ - hours spent for Math homework on
Tuesday
⅖ - hours spent for Math homework on
Wednesday
Asked: The number of hours spent for Math
homework from Monday to Wednesday.
Number Sentence: ⅔ + ¾ + ⅖ = N
Answer: ⅔ + ¾ + ⅖ = N
Using the least common denominator of 3, 4, and 5 express the fractions as similar.
(20)(2)/60 + (15)(3)/60 + (12)(2)/60 = N
40/60 + 45/60 + 24/60 = N
85/60 + 24/60 = N
109/60 = N
1 49/60 = N
Therefore, Jose completed his Math homework for 1 hours.
2. 13/16 cm
solution:
Given: 3 7/16 cm of wire
2 ⅝ cm of wire needed for the project in TLE
Asked: The length of wire that Mika needs to cut.
Answer: 3 7/16 - 2 ⅝ = N
Rename the fraction as similar fractions.
7/16 = 7/16
5/8 = 10/16
Proceed with the subtraction.
3 7/16 - 2 10/16 = N
since is greater than we need to rename again the fraction.
2 23/16 - 2 10/16 = N
Therefore, Mika had to cut cm of wire.
3. ¾ kg
solution:
Given: 4 ½ kg of spaghetti
6 families
Asked: The amount of spaghetti that each family can take home.
Number Sentence: 4 ½ ÷ 6 = N
Change 4 ½ to improper fraction.
4 ½ = 9/2
Proceed with thr divesion.
9/2 ÷ 6 = N
Get the reciprocal of 6 and change the operation to multiplication.
9/2 × ⅙ = 9/12
Express the answer in lowest term.
9/12 ÷ 3/3 = ¾ kg
Therefote, each family can take home kg of spaghetti.
