Maths Quiz - Decimal Numbers 3 (Easy) (Answers)
Welcome to the third in our Easy section of Eleven Plus maths quizzes on decimal numbers. In it we look in particular at the value of those digits placed after the decimal point. You know that, in whole numbers, the columns read right to left are for ones, tens, hundreds, thousands etc. Well. In decimal numbers, it’s almost the same, but with no ‘ones’ column - and in reverse!
Perhaps this will help make it clearer:
The fractions get smaller and smaller as you read left to right.
Have a go at this quiz and see how well you understand decimals. Once you get all questions right first time, why not move on to our next quiz for more of a challenge!
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10 thousandths are the same as one-hundredth, and would be shown in decimal as 0.01
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Three-thirds make one!
If all the numbers after the decimal point are zeros, then you can leave them out |
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One-third as a decimal is 0.333... so two-thirds is 0.333... + 0.333... = 0.666... which we round up to 0.667
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One-third as a decimal is 1 ÷ 3 = 0.333… the threes are recurring, which means they go on forever!
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The third column after the decimal point represents thousandths, not hundredths
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Five hundredths are the same as one-twentieth
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TIP:
The first number to the right of the dp is in the tenths place position, e.g. 8 in 0.8 The second number to the right of the dp is in the hundredths place position, e.g. 7 in 0.87 The third number to the right of the dp is in the thousandths place position, e.g. 2 in 0.872 |
Decimal numbers are in columns just like ordinary numbers - but backwards! Thousands, hundreds, tens, ones, tenths, hundredths, thousandths
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There is no 'ones' column after the decimal point - it's tenths first, then hundredths, thousandths etc.
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TIP:
The first number to the right of the dp is in the tenths place position, e.g. 3 in 7.3 The second number to the right of the dp is in the hundredths place position, e.g. 9 in 7.39 The third number to the right of the dp is in the thousandths place position, e.g. 6 in 7.396 |