5th Q3 CA Math Review

Joy is 12 years old. Her brother, Christian, is 6 years more than half her age. Which numerical expression can be used to find Luis's age?

•  $12\div\left(2+6\right)$  

•  $12\div2+6$  

•  $12\times2+6$  

•  $12\times\left(2+6\right)$  

Matt has 14 stickers. He keeps 3 stickers for himself and gives away the remaining stickers equally to his 6 younger sisters. Which expression represents the number of stickers Matt will give each of his sisters?

•  $\left(14-3\right)\div6$  

•  $14-\left(3\div6\right)$  

•  $14\ \times\ 3\ \div6$  

•  $14\times3\times6$  

Compare how to evaluate

 $3\times\left(7+2\right)\ and\ 3\times7+2$  

• In  $3\times\left(7+2\right)$  , add 7+2 first because it is in parenthesis and then multiply the sum times 3. In  $3\times7+2$  , multiply   $3\times7$  first becuase multiplication comes before addition in order of operations. 

• In  $3\times\left(7+2\right)$ , first multiply  $3\times7$  and then add 4. Then to evaluate  $3\times7+2$  , first add  $7+2$  and then multiply by 2. 

• In both expression, multiply first because multiplication comes before addition in order of operations. 

• In both expressions, add 5 and 4 first because the first expression has parentheses. 

Last years basketball team had a total of 8 fourth graders and 4 fifth graders. The number of players on this school years team can be represented by the expression  $3\times\left(8+4\right)$  . Which statement correctly compares the number of players each year? 

• This year's team has 3 times as many players as last year's team but the same number of player's than last year's team. 

• This year's team has 3 more total players than last year's team. 

• This year's team has 3 times fewer total players than last year's team. 

• This year's team has 3 times as many total performers than last year's team. 

Which expression represents the statement "divide the sum of 18 and 4 by the difference of 13 and 2".

• $\left(18+4\right)\div13-2$

• $18+4\div13-2$

• $\left(18+4\right)\div\left(13-2\right)$

• $18+4\div\left(13-2\right)$

Which multiplication problem does this model show?

• $\frac{1}{3}\times\frac{3}{12}=\frac{3}{4}$

• $\frac{3}{4}\times\frac{1}{3}=\frac{3}{12}$

• $\frac{9}{12}\times\frac{3}{12}=\frac{10}{12}$

• $\frac{3}{12}\times\frac{1}{3}=\frac{3}{36}$

 $\frac{2}{4}\times3$  using a number line. How can he show this on a number line and find the product? 

• First, draw a number line with 2 wholes and divide each whole in 3 smaller parts. Then shade 3 of the parts in each whole. There will be seven-thirds shaded to equal the product of  $\frac{2}{4}$  and 3.

• First, draw a number line with 4 wholes and divide each whole into 2 smaller parts. Then shade 3 of the parts in each whole. There will be five-fourths shaded to equal the product of  $\frac{2}{4}\times3$  .

• First, draw a number line with 3 wholes and divide each whole in 4 smaller parts. Then, shade 2 of the parts in each whole. There will six fourths shaded to equal the product of  $\frac{2}{4}\times3$  

• First, draw a number line with 3 wholes and another number line with 3 wholes. Then divide both of those number lines into 2 pieces. 

Which statement is true about $\frac{3}{4}\times\frac{1}{3}$  ? 

• The product will be greater than  $\frac{1}{3}$  

• The expression is equal to  $\frac{3}{4}$ times 3. 

• The expression is equal to  $\frac{3}{4}$  divided by  $3$  

• The product will be greater than 1. 

Which expression matches  $\frac{5}{6}\times3$  

•  $\left(5\times3\right)\div6$  

•  $5\div3\times2$  

•  $\frac{15}{18}$  

•  $6\times3\div5$  

Which expression matches $5\times\frac{2}{3}$  ? 

•  $5\times2\times3$  

•  $5\times2\div3$  

•  $\frac{10}{15}$  

•  $\frac{10}{3}$