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Write ‘T’for true and 'F’ for false for each of the following:
Q `0.5 xx 0.05 = 0.25`

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The correct Answer is:
To determine whether the statement `0.5 xx 0.05 = 0.25` is true or false, we can follow these steps: ### Step 1: Multiply the two decimal numbers We need to calculate \(0.5 \times 0.05\). ### Step 2: Perform the multiplication - First, ignore the decimals and multiply the numbers as if they were whole numbers: \[ 5 \times 5 = 25 \] ### Step 3: Count the decimal places - Now, we need to count the total number of decimal places in the original numbers: - \(0.5\) has 1 decimal place. - \(0.05\) has 2 decimal places. - Therefore, the total number of decimal places is \(1 + 2 = 3\). ### Step 4: Place the decimal in the result - We take the result from step 2, which is \(25\), and place the decimal point to account for the 3 decimal places: \[ 25 \rightarrow 0.025 \] ### Step 5: Compare the result with the statement - The result of \(0.5 \times 0.05\) is \(0.025\). - The statement claims that \(0.5 \times 0.05 = 0.25\), which is not true because \(0.025\) is not equal to \(0.25\). ### Conclusion - Therefore, the statement `0.5 xx 0.05 = 0.25` is **False (F)**. ---
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Knowledge Check

  • Write ‘T’ for true and ‘F’ for false foe each of the following: ( i ) 645 in standard form is 6.45 xx 10^(2). ( ii ) 27000 in standard form is 27 xx 10^(3). ( iii ) (3^(0)+4^(0)+5^(0))=12. ( iv ) Reciprocal of 5^(6) is 6^(5) . ( v ) If 5^(-1) xx x =8^(-1), then x =frac(8)(5).

    A
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    B
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    D
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