Solved PYQs 35-41 of 96: Fractions and Decimals | IMO Level 1- Mathematics Olympiad (SOF) Class-5 | Chapter-wise

I think of a decimal number. After I have subtract 2.7 from it, then multiplied by 3 and then added 0.19, I get 10.2. What is the decimal number?

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I think of a decimal number. After I have subtracted 3.5 from it, then multiplied by 2 and then added 0.56, I get 1.2. what is the decimal number?

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I think of a decimal number. After I have subtracted 2.3 from it, then multiplied by 2 and then added 0.6, I get 2. What is the decimal number?

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I think of a decimal number. After I have multiplied by 2 from it then added 2.1 and then I have subtracted 3.2, I get 3.4. what is the decimal number?

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The table shows the number of boys and girls that wear spectacles in class 3.

What is the fraction of girls in class 3-C to the number of boys in 3-A and 3-B?

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What is the missing value in the given mathematical statement?

${\displaystyle 0.54\times 15=0.54\times 5+0.54\times 3+0.54\times \_\_\_\_\_\_?}$

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What is the missing value in the given mathematical statement?

${\displaystyle 0.12\times 16=0.12\times 6+0.12\times 8+0.12\times \_\_\_\_}$

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