Estimating Decimals
123.46
What is the sum of 2.4 + 3.7 ?
6.1
What is the difference of 8.5 - 4.2?
4.3
What is 29.84 rounded to the nearest whole number?
30
What is the sum of 2.2 + 4.5 + 1.19?
7.89
What is the difference of 15.6 - 12.27?
3.33
Kayla’s dollhouse has 15.15 square feet downstairs and 6.45 square feet upstairs. What is the estimated total area if you round the decimals to the nearest tenth?
21.7
What is the sum of 32.15 + 49.6?
81.75
Jackie has $5 for the school store. She wants to buy pencils and erasers. Pencils cost $3.50 and erasers cost $2.60. How much more money does Jackie need?
$1.10
A wildlife researcher is studying the weights of sea turtles. She recorded the weights of five turtles: 102.38 kg, 98.67 kg, 105.92 kg, 97.05 kg, and 100.84 kg. To simplify her data, she decides to round each weight to the nearest whole number. What is the difference between the heaviest and lightest turtle after rounding their weights?
9
Lawrence spent $1.89 on a bottle of paint and $0.45 on a brush. What is the total amount Lawrence spent?
$2.34
Juan is going out to lunch. He buys a slice of pizza for $2.50, a soda for $1.75, and a cookie for $2.25. Juan pays with a $10 bill. What should Juan get back for change?
$3.50
The zookeeper is preparing meals for three different animals. The elephant needs 89.76 kg of food, the giraffe requires 45.23 kg, and the rhinoceros needs 67.59 kg. To make it easier to measure, the zookeeper wants to round each amount to the nearest whole number. What is the total amount of food the zookeeper will prepare after rounding each animal's portion?
203
Julie wants to go to the movies. A ticket costs $8.50, a popcorn costs $4.25, and a soda costs $2.35. If her mom gave her $20, will she have enough to purchase a ticket, popcorn, and a soda? How much will these items cost?
Yes, it will only cost $15.10
Amber bought a hardcover book for $23.70 and a paperback for $6.91. How much did she spend in all? If she paid with 2 twenty-dollar bills, how much change did she get?
Total cost: $30.61
Change: $9.39