Finding 100, 1,000 and 10,000 More or Less - Word - Answer Key - Mental Math Practice

Sep 30, 2026

Uploaded by Patrick

Worksheet answer key for solving word problems that require mental math with increments of 100, 1,000, and 10,000. Problems describe realistic contexts such as printing posters, growing corn, hosting park visitors, storing boxes, planting seeds, raising tulips, collecting bottles, selling popcorn, and measuring totals for people, fish, phones, apples, cards, and dollars. Each question is paired with the computed final value.

LanguageEnglish

CategoryExam

FormatPDF

Pages3

Reading Time8 min

AccessFree to download

Mental Math Word Problems (100, 1,000, 10,000)

Answers for Problems 1-15

Finding 100, 1,000 and 10,000 More or Less (Word) Name: | Use mental math to solve each problem.
1) A print shop printed 7,169 posters last month. This month it printed 1,000 fewer posters. How many posters did it print this month? | | | | | Answers
1. | | | | | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 2) | A farm grew 50,024 ears of corn last season. This season it grew 1,000 more. How many ears of corn did the farm grow this season? | | | | 2. | | | | | | | | | 3) | A national park had 59,166 campers this spring. This summer it had 10,000 more campers. How many campers were there this summer? | | | | 3.
4. | | | | | | | | | 4) | A warehouse stored 68,917 boxes in June. In July it stored 100 fewer boxes. How many boxes did it store in July? | | | | 5. | | | | | | | | | 5) | A farmer planted 4,508 seeds in one field. In the next field he planted 1,000 more seeds. How many seeds did he plant in the next field? | | | | 6. | | | | | | | | | 6) | A gardener grew 7,627 tulips in one garden. In another garden he grew 1,000 fewer tulips. How many tulips did he grow in the other garden? | | | | 7. | | | | | | | | | 7) | A national park had 6,997 visitors in July. In August it had 1,000 more visitors. How many visitors did the park have in August? | | | | 8.
9. | | | | | | | | | 8) | A charity raised 72,237 dollars last year. This year it raised 1,000 dollars more. How many dollars did it raise this year? | | | | 10. | | | | | | | | | 9) | A pond had 875 fish in the spring. By fall there were 100 fewer fish. How many fish were in the pond in the fall? | | | | 11. | | | | | | | | | 10) | A farmer harvested 4,622 apples last week. This week he harvested 1,000 fewer apples. How many apples did he harvest this week? | | | | 12.
13. | | | | | | | | | 11) | A phone company sold 53,611 phones in the spring. In the summer it sold 10,000 more phones. How many phones did it sell in the summer? | | | | 14. | | | | | | | | | 12) | A recycling center collected 9,452 bottles in one week. The next week it collected 1,000 fewer bottles. How many bottles did it collect that week? | | | | 15. | | | | | | | | | 13) | A movie theater sold 952 bags of popcorn on Friday. On Saturday it sold 100 fewer bags. How many bags of popcorn did it sell on Saturday? | | | | | | | | | | | | | 14) | Ned collected 406 baseball cards. His cousin collected 100 more cards. How many cards did his cousin collect? | | | | | | | | | | | | | 15) | A small town has 35,715 people. A nearby city has 10,000 more people than the town. How many people live in the city? | | | | | | | | | | | | | | Math
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11-15 | 93 | 87 | 80 | | 73 | 67 | 60 | 53 | 47 | 40 | 33 | | | | 27 | 20 | 13 | | 7 | 0 | | | | | | Finding 100, 1,000 and 10,000 More or Less (Word) Name: Answer Key | Use mental math to solve each problem.
1) A print shop printed 7,169 posters last month. This month it printed 1,000 fewer posters. How many posters did it print this month? | | | | | Answers
1. 6,169 | | | | | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 2) | A farm grew 50,024 ears of corn last season. This season it grew 1,000 more. How many ears of corn did the farm grow this season? | | | | 2. 51,024 | | | | | | | | | 3) | A national park had 59,166 campers this spring. This summer it had 10,000 more campers. How many campers were there this summer? | | | | 3. 69,166 4. 68,817 | | | | | | | | | 4) | A warehouse stored 68,917 boxes in June. In July it stored 100 fewer boxes. How many boxes did it store in July? | | | | 5. 5,508 | | | | | | | | | 5) | A farmer planted 4,508 seeds in one field. In

FAQs

What math skill do these problems practice?

They practice mental math for finding totals that are more or less by 100, 1,000, or 10,000 in everyday word problems.

How is the answer key organized?

It lists the final answers corresponding to each numbered problem from 1 to 15.

What types of scenarios are included?

The worksheet uses practical stories such as printing, farming, parks, storage, recycling, sales, and collecting items to create numerical comparisons.

Sep 30, 2026

Uploaded by Patrick