Estimate whole numbers
Ms. Allen purchased a new car for $18,799. It was advertised that the purchase price of the car was discounted by $2,799. What is the best estimate for the original cost of the car?
$22,000
Maria ran 1.89 miles on Monday and 2.08 miles on Tuesday. On Wednesday, maria ran twice as many miles as she ran on Monday. Approximately how many miles did Maria run on Monday, Tuesday, and Wednesday combined?
8 miles
Kendall worked 2¾ hours each day for 5 days cleaning the garage. Which is the best estimate of the number of hours Kendall spent cleaning the garage?
15 hours
What is the value of the expression below?
40 ÷ (9 - 4) x 2
16
An expression is shown.
7[(3.25 + 1.75) x (4 x 2)]
What is the value of the expression?
280
Madge held the school high jump record for 344 weeks. Which is the best estimate of the number of years Madge held the record?
about 7 years
Each month Ramona's dad pays $19.95 for Internet service. So far this year, he has spent $179.55 on Internet service. Which is the best estimate of the number of months Ramona's dad has paid for Internet service this year?
9 months
Toby sells nachos at the baseball concession stand. Each serving of nachos contains about 3⅓ ounces of chips. Which is the best estimate of the number of servings of nachos Toby could make from a 51⅝ ounce bag of chips?
around 17
Julia is evaluating the numerical expression below.
16 - 8[(3 + 6) ÷ 9]
Her first two steps are shown.
step 1: 3 + 6 = 9
step 2: 9 ÷ 9 =1
What should Julia do next?
multiply 8 x 1
Gina and a friend ate a snack at Burger Buffet. They each ordered a drink for $2.50 and shared an order of nachos for $7. They shared the cost equally. Gina used the expression below to calculate her cost.
[(2.50 + 2.50) + 7] ÷ 2
How much did Gina pay for her snack?
$6.00
A total of 386 students signed up to participate in the Friendship club. The club will be divided into small groups with approximately 8 students in each group. About how many small groups of students will participate in the Friendship club?
about 50
Before it erupted on May 18, 1980, Mount St. Helens was 9,677.25 feet tall. After the eruption, Mount St. Helens was 8,365.73 feet tall. About how much taller was Mount St. Helens before it erupted?
about 1,300 feet
Luke has 2 horses named Sally and Rose. Sally eats about 11⅖ pounds of food every day. Rose eats about 2¾ times as much food as Sally. Approximately how many total pounds of food do Sally and Rose eat each day?
about 44 pounds
Angela wrote the expression shown.
75 ÷ 5 + 8(3 + 4)
What do the parenthesis indicate in the expression?
A Multiply 8 and 3 before adding 4
B Add 5 and 8 before adding 3 and 4
C Add 3 and 4 before multiplying by 8
D Divide 75 and 5 before adding 8
C Add 3 and 4 before multiplying by 8
At a clothing store, Rachel bought 3 sweaters for$16.75 each and 4 pairs of blue jeans for $32 each. She used a coupon for $15 off the total price of the clothes. The discounted price of the clothes Rachel bought can be found using this expression
[3(16.75) + 4(32)] - 15
What is the discounted price of the clothes Rachel bought?
$163.25
During the week, Sweet Tooth Bakery sold 28 boxes of their chocolate chip cookies. Each package had 32 chocolate chip cookies. About how many chocolate chip cookies did the bakery sell?
about 900
Kisha is decorating a gingerbread house. She spends $11.52 for 6.2 pounds of candy. Which is the best estimate of the cost of each pound of candy?
about $2
Dexter's average speed on his bike is 5¼ miles per hour. Dexter biked for 2⅖ hours. Approximately how far did Dexter bike?
about 10 miles
(10 ÷ 2) × 7 + 5 − 4 = s
s =?
s =36
Emily made 18 batches of cookies. Each batch had 10 cookies.
*the cookies were packed in packages of 9
*each package was sold for $8.25
The total amount of money Emily made from selling the cookies can be represented by this expression:
[(18 x 10) ÷ 9] x 8.25
How much money did Emily make from selling the cookies?
$165
Steven is training for a marathon. He runs 42 miles each week. About how many miles will he run in 19 weeks?
about 800 miles
Kara had $100 to spend for school clothes. She bought a skirt for $23.76, two shirts for $10.15 each, and a pair of shoes for $23.55 She spent the rest of the money for a belt. About how much money did Kara's belt cost?
about $30
Travion is cooking bake beans for a picnic. His recipe requires ⅘ pound of sausage. Travion triples his recipe. Approximately how many pounds of sausage does he use?
about 3 pounds
Which has a value less than 40?
A. (180 ÷ 6) - 2 + (6 x 2)
B. (180 ÷ 6 - 2) + (6 x 2)
C. 180 ÷ 6 - 2 + (6 x 2)
D. (180 ÷ 6) - (2 + 6 x 2)
D. (180 ÷ 6) - (2 + 6 x 2)
On Sunday a bakery earned $258 from selling raspberry, blueberry, and pecan muffins.
*they sold 52 muffins for $3 each
*they sold 19 muffins for $2 each
The equation can be used to find, m, the amount of money that was earned from selling pecan muffins.
258 - [(52 x 3) + (19 x 2)]
How much money was made from selling the pecan muffins?
$64