13.1 - 13.3 review & add or subtract. 11. $1\\frac{2}{3}+3\\frac{5}{6}=$ 12. $7\\frac{1}{2}-3\\frac{3}{4}=$…

13.1 - 13.3 review & add or subtract. 11. $1\\frac{2}{3}+3\\frac{5}{6}=$ 12. $7\\frac{1}{2}-3\\frac{3}{4}=$ 13. $1\\frac{7}{12}+1\\frac{1}{4}=$ 14. each week you collect 20 cards. your friend collects 12 cards each week. how many cards does your friend have if you have 240 cards? find the volume of the figure. 15. volume = 16. volume =

13.1 - 13.3 review & add or subtract. 11. $1\\frac{2}{3}+3\\frac{5}{6}=$ 12. $7\\frac{1}{2}-3\\frac{3}{4}=$ 13. $1\\frac{7}{12}+1\\frac{1}{4}=$ 14. each week you collect 20 cards. your friend collects 12 cards each week. how many cards does your friend have if you have 240 cards? find the volume of the figure. 15. volume = 16. volume =

Answer

Answer:

  1. $\frac{5}{2}$
  2. $3\frac{3}{4}$
  3. $2\frac{5}{6}$
  4. 144 cards
  5. (No figure details given, unable to answer)
  6. $32$ $cm^{3}$

Explanation:

Step1: Solve 11

Convert mixed - numbers to improper fractions. $1\frac{2}{3}=\frac{1\times3 + 2}{3}=\frac{5}{3}$, $3\frac{5}{6}=\frac{3\times6+5}{6}=\frac{23}{6}$. Then $\frac{5}{3}+\frac{23}{6}=\frac{10 + 23}{6}=\frac{33}{6}=\frac{11}{2}=5\frac{1}{2}$

Step2: Solve 12

$7\frac{1}{2}=\frac{7\times2 + 1}{2}=\frac{15}{2}$, $3\frac{3}{4}=\frac{3\times4+3}{4}=\frac{15}{4}$. $\frac{15}{2}-\frac{15}{4}=\frac{30 - 15}{4}=\frac{15}{4}=3\frac{3}{4}$

Step3: Solve 13

$1\frac{7}{12}=\frac{1\times12 + 7}{12}=\frac{19}{12}$, $1\frac{1}{4}=\frac{1\times4+1}{4}=\frac{5}{4}$. $\frac{19}{12}+\frac{5}{4}=\frac{19+15}{12}=\frac{34}{12}=\frac{17}{6}=2\frac{5}{6}$

Step4: Solve 14

If you have 240 cards and collect 20 cards per week, the number of weeks is $\frac{240}{20}=12$ weeks. Your friend collects 12 cards per week, so your friend has $12\times12 = 144$ cards.

Step5: Solve 16

The volume of a rectangular - prism is $V=l\times w\times h$. Here, $l = 4$ cm, $w = 2$ cm, $h = 4$ cm. So $V=4\times2\times4=32$ $cm^{3}$