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

By Catalin David
Problems involving adding and subtracting numbers up to 1000 for third grade.
Problem 1
400 + 300 =
Problem 2
800 - 600 =
Problem 3
120 + 230 =
Problem 4
470 - 130 =
Problem 5
620 - 410 =
Problem 6
354 + 235 =
Problem 7
746 - 521 =
Problem 8
423 + 256 - 554 =
Problem 9
964 - 513 - 251 =
Problem 10 sent by Simona
Mike had \$480. He bought a table for \$138 and two chairs for \$160. Mike left with \$.

Problem 11 sent by Sevdjanka
Find the perimeter of a rectangle if its sides are 200cm and 40 cm.
Problem 12
(683 - 571) + (829 - 315) =
Problem 13
274 + [459 - (324 + 123)] =
Problem 14
Compare
759 - 325 - 113 759 - (325 + 113)
Problem 15
Compare
347 - 125 + 232 - 121 (347 + 232) - (125 + 121)
Problem 16
At a shop, 579 kg of oranges were sold in two days. If in the first day 265 kg were sold, how many were sold in the second day?
Problem 17
There are 143 cars on the first floor of a parking building, 132 cars on the second floor and 120 cars on the third floor. How many cars are there in the whole building?
Problem 18
Tim has 678 dollars. One day, he spends 132 dollars and the next day, he spends 135 dollars. How many dollars are left after the two days?
Problem 19
What number is 104 more than 385?
Problem 20
What number is 435 less than 769?
Problem 21
A book has 359 pages. If Tim has read 233 pages, how many pages are left?
Problem 22
A tablet costs 458 dollars. If Matt needs 142 more dollars to buy it, how many dollars does he have?
Problem 23
In a school, there are 472 boys and 517 girls. How many children are there in the school?

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