Flash Cards
1/20
What are decimals?
Decimals are the natural extension of the Indian place value system to represent decimal fractions such as 1/10, 1/100, 1/1000, etc.
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2/20
How is 27.53 broken down by place value?
27.53 consists of 2 Tens, 7 Units (Ones), 5 Tenths, and 3 Hundredths.
3/20
How do you multiply decimals?
Multiply as with counting numbers, then place the decimal point based on the total decimal places in both numbers.
4/20
Example of multiplying decimals: What is 9.5 × 5?
9.5 × 5 = 47.5.
5/20
What is the formula to divide a number by 10?
Move the decimal point of the number left by one place.
6/20
Example of dividing: What is 123 ÷ 10?
123 ÷ 10 = 12.3.
7/20
Can the product of two decimals be a natural number?
Yes, for example, 0.5 × 2 = 1 is a natural number.
8/20
How do you divide a decimal by a decimal?
Convert the divisor into a whole number by multiplying by 10, 100, etc., and adjusting the dividend accordingly.
9/20
What is the distance if a car travels 12.5 km/l with 7.5 litres?
12.5 × 7.5 = 93.75 km.
10/20
Find the area of a rectangle with dimensions 5.7 cm and 13.3 cm.
Area = 5.7 × 13.3 = 75.81 sq cm.
11/20
What happens when dividing by numbers like 10, 100?
You move the decimal point to the left and count the zeros.
12/20
What is 3.9 ÷ 10?
3.9 ÷ 10 = 0.39.
13/20
Rules for dividing decimals?
Move the decimal point to the left for each zero in the divisor.
14/20
What is 1324 ÷ 4 using long division?
The result is 331.
15/20
What can be inferred from 10 ÷ 3?
It results in a repeating decimal: 3.333...
16/20
How do leap years adjust for calendar discrepancies?
An extra day is added every four years but not in every hundredth year, unless divisible by 400.
17/20
What is the relationship among dividend, divisor, and quotient?
The quotient is always less than the dividend when the divisor is greater than 1.
18/20
Convert 2/5 to decimal.
2/5 = 0.4.
19/20
What is the value of 0.06 ÷ 5?
0.06 ÷ 5 = 0.012.
20/20
What is the importance of decimal places in multiplication?
Total decimal places in the product equals the sum of the decimal places of the multiplicands.
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