Basic Operations Practice

1. Add 0.98 + 45.102 + 32.3333 + 31 + 0.00009

1. 368.573
2. 210.536299
3. 109.41539
4. 99.9975
5. 80.8769543

2. Find 0.12 ÷ 1

1. 12
2. 1.2
3. .12
4. .012
5. .0012

3. (9 ÷ 3) x (8 ÷ 4) =

1. 1
2. 6
3. 72
4. 576
5. 752

4. 6 x 0 x 5

1. 30
2. 11
3. 25
4. 0
5. 27

5. 7.95 ÷ 1.5

1. 2.4
2. 5.3
3. 6.2
4. 7.3
5. 7.5

6. -32 + 7 equals:

1. -25
2. 25
3. -26
4. 26
5. 27

7. -37 + -47 equals:

1. 64
2. -84
3. 65
4. -75
5. -66

8. 41% equals:

1. 4.1
2. .41
3. .041
4. .0041
5. .00415

Answers & Explanations

1. C: Aligning the decimals at the decimal point and adhering to the same integer addition computation properties, the sum is equal to 109.41539.
2. C: Any number divided by 1 is equal to itself, thus 0.12 ÷ 1 = 0.12.
3. B: By first performing the computations within the parentheses, the expression may be rewritten as 3 × 2, which equals 6.
4. D: The product is 0, since the product of any number, or numbers, and 0, equals 0.
5. B: The division may be performed by first dividing 1.5 into 7.9 and then dividing 1.5 into 0.45. Doing so gives a quotient of 5.3
6. A: Addition of 7 to the integer, -32, shows a movement of 7 units to the right, giving a sum of -25.
7. B: The sum of the two negative integers will be negative. Starting at -37 on a number line and moving 47 units to the left, gives a sum of -84.
8. B: The percentage, 41%, may be converted to a decimal by moving the decimal point two places to the left. In other words, 41 is divided by 100 (or multiplied by 1/100), since one percent represents one-hundredth.