| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.09 |
| Score | 0% | 62% |
A bread recipe calls for 2\(\frac{3}{8}\) cups of flour. If you only have \(\frac{3}{8}\) cup, how much more flour is needed?
| 1\(\frac{1}{4}\) cups | |
| 2\(\frac{3}{8}\) cups | |
| 1\(\frac{3}{4}\) cups | |
| 2 cups |
The amount of flour you need is (2\(\frac{3}{8}\) - \(\frac{3}{8}\)) cups. Rewrite the quantities so they share a common denominator and subtract:
(\( \frac{19}{8} \) - \( \frac{3}{8} \)) cups
\( \frac{16}{8} \) cups
2 cups
Which of the following statements about exponents is false?
b1 = b |
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b1 = 1 |
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all of these are false |
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b0 = 1 |
A number with an exponent (be) consists of a base (b) raised to a power (e). The exponent indicates the number of times that the base is multiplied by itself. A base with an exponent of 1 equals the base (b1 = b) and a base with an exponent of 0 equals 1 ( (b0 = 1).
What is the least common multiple of 6 and 14?
| 27 | |
| 81 | |
| 46 | |
| 42 |
The first few multiples of 6 are [6, 12, 18, 24, 30, 36, 42, 48, 54, 60] and the first few multiples of 14 are [14, 28, 42, 56, 70, 84, 98]. The first few multiples they share are [42, 84] making 42 the smallest multiple 6 and 14 have in common.
What is \( \frac{2}{7} \) x \( \frac{4}{8} \)?
| \(\frac{1}{7}\) | |
| 1\(\frac{1}{7}\) | |
| \(\frac{1}{8}\) | |
| \(\frac{8}{45}\) |
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{2}{7} \) x \( \frac{4}{8} \) = \( \frac{2 x 4}{7 x 8} \) = \( \frac{8}{56} \) = \(\frac{1}{7}\)
The __________ is the smallest positive integer that is a multiple of two or more integers.
least common multiple |
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least common factor |
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absolute value |
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greatest common factor |
The least common multiple (LCM) is the smallest positive integer that is a multiple of two or more integers.