Decimals Quiz - ICSE Class 5 Mathematics
Free practice quiz: Decimals (ICSE Class 5 Mathematics). 50 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
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If 3.456 is multiplied by 100, what is the new number?
- 34.56
- 345.6
- 3456
- 0.3456
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Answer: B. 345.6
Multiplying a decimal by 100 shifts the decimal point two places to the right. So, 3.456 becomes 345.6.
What is 2.5 x 0.1?
- 0.025
- 0.25
- 25
- 2.50
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Answer: B. 0.25
To multiply decimals, multiply them as if they were whole numbers: 25 x 1 = 25. Then count the total number of decimal places in the numbers being multiplied (one in 2.5 and one in 0.1, for a total of two). Place the decimal point in the answer so there are two decimal places. So, 0.25.
Which fraction is equivalent to 0.5?
- 1/2
- 1/4
- 3/4
- 2/5
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Answer: A. 1/2
0.5 means 5 tenths, which can be written as the fraction 5/10. This fraction can be simplified by dividing both numerator and denominator by 5, resulting in 1/2.
Which of the following decimals is equivalent to 2/5?
- 0.4
- 0.2
- 0.5
- 0.25
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Answer: A. 0.4
To convert the fraction 2/5 to a decimal, you can either divide 2 by 5 (2 ÷ 5 = 0.4) or make the denominator 10 by multiplying both numerator and denominator by 2 (2x2)/(5x2) = 4/10 = 0.4.
Which fraction is equal to 0.75?
- 75/100
- 75/10
- 7/5
- 3/4
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Answer: D. 3/4
0.75 means 75 hundredths, or 75/100. To simplify this fraction, divide both numerator and denominator by their greatest common divisor, which is 25. 75 ÷ 25 = 3 and 100 ÷ 25 = 4. So, 0.75 is equal to 3/4.