1. 7 + 3 =
a. 4
b. 8
c. 9
d. 10
2. 9 − 2 =
a. 7
b. 8
c. 6
d. 5
3. 8 ÷ 2 =
a. 6
b. 4
c. 5
d. 7
4. 3 × 3 =
a. 6
b. 7
c. 8
d. 9
5. 54 − 17 =
a. 37
b. 39
c. 41
d. 43
6. 62 + 7 =
a. 64
b. 68
c. 69
d. 70
7. 25 + 16 =
a. 37
b. 41
c. 45
d. 51
8. 23 + 22 =
a. 45
b. 55
c. 61
d. 62
9. 39 − 18 =
a. 7
b. 11
c. 16
d. 21
10. 36,785 − 188 =
a. 35,697
b. 36,497
c. 36,597
d. 37,007
11. 72 + 98 − 17 =
a. 143
b. 153
c. 163
d. 170
12. 376 − 360 + 337 =
a. 663
b. 553
c. 453
d. 353
13. 444 + 332 − 216 =
a. 312
b. 450
c. 560
d. 612
14. 2,710 + 4,370 − 400 =
a. 6,780
b. 6,680
c. 6,580
d. 6,480
15. 7,777 − 3,443 + 1,173 =
a. 5,507
b. 5,407
c. 5,307
d. 5,207
16. | 7 | =
a. –7
b. 0.7
c. 7
d. 17
Answers:
1. d. The correct answer to this basic addition
problem is 10.
2. a. The correct answer to this basic subtraction
problem is 7.
3. b. The correct answer to this basic division
problem is 4.
4. d. The correct answer to this basic multiplication
problem is 9.
5. a. The correct answer is 37; this is another
basic subtraction problem. A mistaken answer
is likely due to an error in computation.
6. c. The correct answer to this basic addition
problem is 69. Again, a mistaken answer is
likely due to an error in computation.
7. b. The correct answer is 41.
8. a. The correct answer is 45.
9. d. The correct answer is 21.
10. c. The correct answer is 36,597.
11. b. In this case (but not in all cases, as you will
see in some problems below), perform the
operations in the order presented, from left
to right: 72 + 98 = 170; then, 170 − 17 = 153.
12. d. Again, do this problem in the order presented;
first subtract, then add; 353 is the correct
answer.
13. c. First add, then subtract. In multi-step problems,
be careful not to rush just because the
operations are simple. The correct answer is
560.
14. b. First add, then subtract. The correct answer
is 6,680.When doing problems involving several
digits, it’s easy to make mistakes. Be sure
to read carefully, no matter how simple the
problem seems.
15. a. First subtract, then add. The correct answer
is 5,507.
16. c. The bars on either side of 7 indicate “the
absolute value of 7.” The absolute value of a
number is the distance that number is away
from zero on a number line. The absolute
value of 7 is 7.
