Topic: Number and Operations  >>  Chooses, describes and explains estimation strategies used to determine the reasonableness of solutions to real-world problems.

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289 elementary school students and 120 middle school students wrote letters for a time capsule. Estimate the total number of letters written.
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A florist sells roses, sunflowers, and tulips. He has 557 flowers in all. If the total number of tulips and sunflowers is 233, estimate the number of roses with the florist. Round to the nearest ten.
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A school planned to take its 573 students for an excursion. 269 out of them were not interested in the place and so they dropped. About how many students went to excursion?
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Amy had 287 photos in one book and 114 photos in another. Estimate the total number of photos that Amy had.
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Amy has collected 831 marbles. If she wants to collect 1,000 marbles, estimate how many more marbles she needs to collect.View Details
Andy has 1,997 football cards. Joseph has 1,643 cards. About how many more cards does Andy have?
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Andy scored 282 in a test and Matt scored 314 in the same test. About how much did Matt score more than Andy?
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Ashley has 156 candies. She gave 79 to her brother. About how many candies does she have?
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Chris on his visit to a safari saw 875 deer and 526 monkeys. Estimate the number of animals that Chris saw.View Details
Eric wants to go to his Aunt's house which is located 1,000 km away from his house. Estimate the distance Eric has to cover, if he already had traveled 560 km.View Details
Gary deposited $812 in his account. Two days later, he depositied again $582. Estimate the final amount in his account. Round it to the nearest hundred.
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In a school, there are 349 girls and 252 boys. About how many students are there in the school?View Details
Jacques has saved $635. If he wants to save $1,000, estimate how much more he still has to save.
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Jerald deposited $19,470 in the first month and $18,259 in the second month in his account. What is the total amount in his account? Round to the nearest ten thousand.View Details
Jim bought 12 apples for $51 and 4 oranges for $19. Estimate the money he spent.View Details
Jim had $202. He spent $183 for shopping. Estimate the amount left with him.
[Round to the nearest ten.]
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Jim had 213 marbles. He gave 88 marbles to his sister Ashley. Rounding to the nearest ten, find out about how many marbles is Jim left with.View Details
Jimmy had 186 chocolates. He distributed 112 of them. Estimate the number of chocolates he has now.View Details
John collected 34 pens and Edward collected 58 pens. About how many did they collect altogether?View Details
John had 28 chocolates. He gave 12 to his friend. About how many chocolates is John left with now?
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John had 37 marbles. He gave 11 to his friend. About how many marbles did he have then?
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John had 47 marbles. He gave 12 to his friend. About how many marbles did he have then?View Details
John scored 423 points and his brother scored 326 points. About how many more points did John score?
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Johnson traveled 215 miles on Monday and 305 miles the next day. Estimate the total distance he traveled to the nearest hundred.View Details
Josh and his wife together earn $9,635 and spend $4,385 every month. By estimating the amount of money they earn and spend each month to the nearest thousand, how much will they save every month.View Details
Kenny deposited $8,736 in a bank. He withdrew $5,124. By estimating the amounts of money he deposited and withdrew, to the nearest thousand, find how much he would have left in the bank.View Details
Lisa wants to buy a doll which costs $1,000. If she has $890, estimate the amount she still needs to buy the doll.
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Marv has collected $870 for a relief fund. If he wants to collect $1,000, then estimate the amount he still needs to collect.
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Matt counted the number of girls and boys in his school. There are 835 boys and 684 girls.
Estimate the total number of students.
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Nathan deposited $423 in his bank account last month and he deposited $978 this month. Estimate the total amount that Nathan deposited.
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Paula gave $472 to Rachel and $318 to John. Estimate the total amount that Paula gave to both Rachel and John.
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Paula had $93. He gave $37 to Rachel. Estimate the amount left with him. Round to the nearest ten.
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Sheela has 3 bank accounts. She deposited $1,990 in each account. Estimate the total amount deposited.
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Sue runs a gift shop. She sold 1,212 balloons last year. This year she sold 2,175 balloons. About how many more balloons did she sell this year? Estimate your answer by rounding it to the nearest hundred.
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Sue runs a greeting card shop. Last year she sold 1,382 christmas cards. This year she sold 4,897 cards. About how many more cards did she sell this year?
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The distance between City A and City B is 531 miles. Kim drove from City A to City B and then returned to City A. Estimate the total distance he traveled.View Details
There are 477 quarts of water in a large water tank. Brad used 343 quarts of water. Estimate the quantity of water left in the tank. Round to the nearest ten.View Details
Tommy earns $8,265 and saves $3,325 every month. Estimate the amount of money he spends every month to the nearest hundred.View Details
Tony deposited $921 and $619 in two banks. Estimate the total amount that he deposited. Round to the nearest hundred.View Details
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