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Problems Involving Adding and Subtracting within 1000

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Problems Involving Adding and Subtracting within 1000: Difficult Problems with Solutions

By Catalin David

Problem 1

345 + 435 =

Problem 2

750 + 150 =

Problem 3

745 + 238 =

Problem 4

472 + 285 =

Problem 5

386 + 495 =

Problem 6

527 + 149 + 286 =

Problem 7

Find the perimeter of a triangle if its sides are:
120 cm, 394 cm, 278 cm.

Problem 8

Find the perimeter of a triangle with sides: 133, 202 and 147.

Problem 9

865 - 428 =

Problem 10

724 - 459 =

Problem 11

754 - 387 - 259 =

Problem 12

There are 460 bells in a souvenir storage. 135 are bronzed. 200 are glass bells and the rest are silver. How many are the silver bells?

Problem 13

256 + 183 + 344 + 217 =

Problem 14

526 - 289 + 274 - 311 =

Problem 15

There are 653 people on a train. At the first stop, 187 get off and 135 get on. How many people will be on the train?

Problem 16

What is the sum of all three-digit numbers whose sum of digits is 2?

Problem 17

The sum of even numbers from 243 to 248 is

Problem 18

The difference between the greatest even 3-digit number and the smallest odd 3-digit number is

Problem 19

The sum of even numbers between 243 and 247 is:

Problem 20

The sum of the smallest 3-digit number whose digits are even and consecutive and the smallest such number whose digits are odd and consecutive is

Problem 21

124 + 185 + 276 + 319 - 124 - 185 - 276 =

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