Test on Friday April 1 (Fraction and some financial literacy)
a. 1 – 3/5 – 1/3 = people did not respond
Common denominator between 5 and 3 = 15
3/5 (change denominator to 15)
(3x3)/(3x5) = 9/15
1/3 (change denominator to 15)
(1x5)/(3x5) = 5/15
1 – 9/15 – 5/15
15/15 – 9/15 – 5/15
1/15 did not respond to the survey
b. 1 – 2/9 – ¼
Common denominator between 9 and 4 = 36
Change 2/9 with a denominator of 36
(2x4)/(9x4) =8/36
Change ¼ with a denominator of 36
(1x9)/(4x9) = 9/36
1 – 8/36 – 9/36
36/36 – 8/36 – 9/36
19/36 of the budget is left
c. 1 – 2/7 – 1/5
Common denominator between 7 and 5 = 35
Change 2/7 with a denominator of 35
(2x5)/(7x5) = 10/35
Change 1/5 with a denominator of 35
(1x7)/(5x7) = 7/35
1 – 10/35 – 7/35
35/35 – 10/35 – 7/35
18/35 of the budget is left
Please work on (l), (m), (n), (o), (p). All similar
l. Rob has 8 1/5 m of ribbon. He uses 3 ¾ m to tie a box and 2 2/3 m to make a bow. How much ribbon is left?
m. Jane spends 3/12 of her day reading, 1/5 of the day playing video games, 2/9 of the day watching You Tube and the rest of the time doing house work. How much time did she send on ding housework? Express your answer in fraction (the day = 1)
n. In a pie eating contest, Takeru Kobayashi (Google him) eats ¾ of a pie in the first 30 seconds, 2/3 of another one in 45 seconds and 1 3/5 pie in the next minute. How many pies did he eat all together?
o. In a forest, 1/6 of the leaves change colour in October. In November, 2/5 changes colour. What portion of the trees have not changed colour?
p. During the quarantine, Mr. Kwok uses 3/7 roll of a toilet paper on Monday, 5/6 roll on Tuesday, 2/5 on Wednesday and 1 1/3 on Thursday. How many rolls of toilet paper did he use in those days?
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