Integer addition and subtraction practice worksheet with 26 problems.

Let's solve each of the integer addition and subtraction problems step by step. The key rules to remember:

- Adding two positive numbers: Add them normally.
- Adding two negative numbers: Add their absolute values and keep the negative sign.
- Adding a positive and a negative number: Subtract the smaller absolute value from the larger one, and the sign of the result is the same as the number with the larger absolute value.
- Subtracting a number: Change the subtraction to addition and change the sign of the number being subtracted (e.g., $ a - b = a + (-b) $).

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Problem Solutions:

1) $(-90) + (+10) = -80$
→ $-90 + 10 = -80$

2) $(459) - (254) = 205$
→ $459 - 254 = 205$

3) $(-7) - (242) = -249$
→ $-7 - 242 = -249$

4) $(71) + (180) = 251$
→ $71 + 180 = 251$

5) $(-333) + (-211) = -544$
→ $-333 - 211 = -544$

6) $(-312) - (471) = -783$
→ $-312 - 471 = -783$

7) $(-161) - (-374) = -161 + 374 = 213$
→ Subtracting a negative is like adding: $-161 + 374 = 213$

8) $(-232) + (-107) = -339$
→ $-232 - 107 = -339$

9) $(381) - (298) = 83$
→ $381 - 298 = 83$

10) $(-173) + (450) = 277$
→ $-173 + 450 = 277$

11) $(-181) - (292) = -473$
→ $-181 - 292 = -473$

12) $(239) + (-105) = 134$
→ $239 - 105 = 134$

13) $(-160) - (-463) = -160 + 463 = 303$
→ $-160 + 463 = 303$

14) $(-140) - (289) = -429$
→ $-140 - 289 = -429$

15) $(119) + (55) = 174$
→ $119 + 55 = 174$

16) $(-276) + (-14) = -290$
→ $-276 - 14 = -290$

17) $(475) - (-155) = 475 + 155 = 630$
→ Subtracting a negative becomes addition: $475 + 155 = 630$

18) $(67) + (-77) = -10$
→ $67 - 77 = -10$

19) $(-243) + (-385) = -628$
→ $-243 - 385 = -628$

20) $(381) - (70) = 311$
→ $381 - 70 = 311$

21) $(-307) - (340) = -647$
→ $-307 - 340 = -647$

22) $(-453) + (421) = -32$
→ $-453 + 421 = -32$

23) $(-37) + (-489) = -526$
→ $-37 - 489 = -526$

24) $(-121) + (-443) = -564$
→ $-121 - 443 = -564$

25) $(-300) + (452) = 152$
→ $-300 + 452 = 152$

26) $(198) - (-190) = 198 + 190 = 388$
→ Subtracting a negative becomes addition: $198 + 190 = 388$

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Final Answers:

1) -80
2) 205
3) -249
4) 251
5) -544
6) -783
7) 213
8) -339
9) 83
10) 277
11) -473
12) 134
13) 303
14) -429
15) 174
16) -290
17) 630
18) -10
19) -628
20) 311
21) -647
22) -32
23) -526
24) -564
25) 152
26) 388

✔ All problems solved! Let me know if you'd like this in a printable format or need explanations for any specific problem.