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Math 20 Homework
Arithmetic

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Recommended Homework Not Turned In for Chapters 1 to 4

Chapter 1 through 4 review problems are online as two pages. Arithmetic review is the first part. Fraction review is the second part.

1. Which is the largest decimal? 0.243, 0.423, 0.324, 0.0423, 0.4023

0.243 0.423 0.324 0.0423 0.4023

2. Which is the smallest decimal? 0.243, 0.423, 0.324, 0.0423, 0.4023

0.243 0.423 0.324 0.0423 0.4023

3. What number is two hundred and twelve thousandths?

0.212 212,000

4. An easy way to divide a number by 1,000 is to scoot the decimal point three places to the...

left right

5. Consider the following six numbers: 315, 1101, 7628, 13025, 110124, and 876. Which are divisible by 3?

315 and 110124
315, 1101, and 7628
315, 1101, and 110124
315, 1101, 110124, and 876

6. Consider the following six numbers: 315, 1101, 7628, 13025, 110124, and 876. Which are divisible by 4?

7628 and 876
7628 and 110124
7628, 110124, and 876
1101, 7628, 110124, and 876

7. What is the prime factorization of 126?

12 × 6
3 × 4 × 2 × 3
2 × 3 × 4 × 7
2 × 3 × 3 × 7
2 × 2 × 2 × 3 × 3
2 × 2 × 3 × 3 × 7

8. How many factors does 126 have?

ten (2 × 63, 3 × 42, 6 × 21, 7 × 18, 9 × 14)
twelve (1 × 126, 2 × 63, 3 × 42, 6 × 21, 7 × 18, 9 × 14)
fourteen (1 × 126, 2 × 63, 3 × 42, 4 × 32, 6 × 21, 7 × 18, 9 × 14)

9. What is the least common multiple of 12 and 18?

12 18 24 36 72