Question 1

Mrs. Jackson has $47$ boxes of crayons.
There are $8$ crayons in each box.

To estimate the total number of crayons, she uses the steps shown below.

$\quad\bullet\enspace$ round $47$ to the nearest ten
$\quad\bullet\enspace$ multiply the new number by $8$

What is Mrs. Jackson's estimate of the total number of crayons?

Accepted Answer

$400$

Answer

$320$

Answer

$450$

Answer

$580$

Question 2

George bought $9$ cases of bottled water.
Each case had $18$ bottles of water in it.

To estimate the number of bottles of water he bought, George rounded 18 to the nearest ten and then multiplied that number by $9$.
What is George's estimate of the number of bottles of water he bought?

Accepted Answer

$180$

Answer

$290$

Answer

$90$

Answer

$209$

Question 3

Kelly is planting groups of seeds.
She places $4$ seeds into each group.
She plants $22$ groups of carrot seeds and $38$ groups of lettuce seeds.

How many total seeds does Kelly plant?

Accepted Answer

$240$

Answer

$200$

Answer

$640$

Answer

300

Question 4

Ethan is knitting a blanket.

He will use 20 balls of yarn.
There are 8 ounces of yarn in each ball.

How many ounces of yarn will Ethan use to knit the blanket?

Accepted Answer

160

Answer

208

Answer

100

Answer

28

Question 5

Esther makes 40 bags of granola mix.

Each bag has 3 ounces of raisins.

How many ounces of raisins, in total, does Esther use to make 40 bags of granola mix?

Accepted Answer

120

Answer

43

Answer

80

Answer

37

Question 6

Frank took 3 piano lessons at school.
Each lesson was 90 minutes long.
He also took a guitar lesson that was 40 minutes long.

What was the total length of time, in minutes, of Frank's music lessons?

Accepted Answer

$310$

Answer

$130$

Answer

$133$

Answer

$210$

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