Practice Test 3 - 3rd Grade Math

18 of the 20 questions below are in this test; the other 2 can't be scored yet. Answer them in any order, then submit to see your score and every explanation.

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1. A student measures a book and states: "The book is about $9$ inches long and exactly $6$ inches wide." What does this statement reveal about the student's measuring precision?
2. Jake has 3 boxes of crayons. Each box contains 9 crayons. Which expression finds how many crayons Jake had at the beginning?
3. Refer to the number line. Which statement is TRUE about point M?
4. Two same-sized gardens are being watered. Garden X has $\frac{6}{10}$ of its area watered, and Garden Y has $\frac{6}{8}$ of its area watered. A student claims that $\frac{6}{10} > \frac{6}{8}$ because 10 > 8. What is wrong with this reasoning?
5. Jamal ate $\frac{3}{4}$ of a small pizza. His sister ate the same amount of a pizza that was cut into 8 equal slices. How many slices did his sister eat?
6. Use the table to answer the question. Which student correctly wrote the whole number as a fraction?
7. Tom starts his homework at 6:45 PM. He spends 35 minutes on math, 53 minutes on science, and takes a 10-minute break in between. What time does he finish?
8. Marcus collected 247 stickers in January and 389 stickers in February. He gave away 156 stickers to his friends. How many stickers does Marcus have left?
9. Use commutative property: if $8\times 9=72$, what is $9\times 8$?
10. Examine the grid. Zoe calculated the area as $6 \times 4 = 24$, but then noticed that 3 unit squares were removed from the rectangle. Which expression correctly shows the actual area?
11. Look at the fraction models below. Which statement correctly explains why $\frac{3}{4}$ and $\frac{6}{8}$ are equivalent fractions?
12. Based on the thermometer reading shown, if the temperature fell by 14 degrees from this point, what would the new temperature be?
13. How much does Kevin have left each week for spending on himself after saving and giving to charity?
14. There are 24 cookies arranged into 6 equal groups. Which math statement correctly explains the number of groups and number of cookies in each group?
15. A number written as 'Six hundred thousand, forty-seven' needs to be compared with the number $600,470$. Which statement about these two numbers is correct?
16. Look at the fence in the figure. The post stands straight up from the ground. What type of triangle is made by the post, the ground, and the slanted rail?
17. Mia buys 6 packs of 30 stickers. How many stickers total?
18. Examine the shapes in the diagram. Which statement correctly compares these polygons?
19. What scale would make the Math bar exactly 4 units tall?
20. Look at the picture of measurement tools below. Marcus needs to measure the distance across his classroom floor, which is about 6 meters wide. Which tool should he choose for the most practical measurement?

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