💣 Q :83 Prep 1 Question Bank T1

a) \( \frac{7}{20} = \) ...... %

\( \frac{7}{20} = 35\% \) (because \( \frac{7}{20} \times 100 = 35 \))

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b) \( | -0.4 | = \) ...... %

\( | -0.4 | = 0.4 = 40\% \) (absolute value removes negative sign, then convert to percentage)

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c) \( | 0.2 | = \) ...... (in the form of \( \frac{a}{b} \))

\( | 0.2 | = \frac{1}{5} \) (because \( 0.2 = \frac{2}{10} = \frac{1}{5} \))

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d) \( | 0.328 | = \) ...... (in the form of \( \frac{a}{b} \))

\( | 0.328 | = \frac{41}{125} \) (because \( 0.328 = \frac{328}{1000} = \frac{41}{125} \))

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e) \( \frac{7}{20} = \) ...... (in the decimal form)

\( \frac{7}{20} = 0.35 \) (because \( 7 ÷ 20 = 0.35 \))

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f) The additive identity in \( \mathbb{Q} \) is ......

TRUE 😊 The additive identity is 0 (because \( a + 0 = a \) for any \( a \))

FALSE 😢 The additive identity is the number that doesn't change other numbers when added

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g) The additive inverse of \( -\frac{4}{9} \) is ......

TRUE 😊 The additive inverse is \(\frac{4}{9}\) (because \( -\frac{4}{9} + \frac{4}{9} = 0 \))

FALSE 😢 The additive inverse is the number that sums to zero

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h) \( -\frac{6}{11} \) is the additive inverse of ......

TRUE 😊 \( \frac{6}{11} + (-\frac{6}{11}) = 0 \)

FALSE 😢 The additive inverse pairs sum to zero

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i) The additive inverse of \( | - \frac{4}{5} | \) is ......

TRUE 😊 \( | - \frac{4}{5} | = \frac{4}{5} \), so its additive inverse is \(-\frac{4}{5}\)

FALSE 😢 First find the absolute value, then find its additive inverse

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j) The additive inverse of -2.3 is ......

TRUE 😊 \(-2.3 + 2.3 = 0\)

FALSE 😢 The additive inverse is the number that sums to zero

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k) The additive inverse of \( (-2)^3 \) is ......

TRUE 😊 \( (-2)^3 = -8 \), so its additive inverse is 8

FALSE 😢 First calculate \( (-2)^3 \), then find its additive inverse

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l) The additive inverse of zero is ......

TRUE 😊 \( 0 + 0 = 0 \), so zero is its own additive inverse

FALSE 😢 Zero is special - it's its own additive inverse

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