Here we have another page on multiplying decimal fractions by 10 or 100. The method used today is to move each number one place to the left when multiplying by ten and two places to the left when multiplying by 100. The decimal point does not move. I seem to remember moving decimal points around when I was at school but this is certainly not recommended here.

When doing this with money it is worth remembering that two digits should always be written after the decimal point, so that £2.56 x 10 is not £25.6, but £25.60. (This is not an excuse for saying ‘add a nought’.)

Multiply by 10 and 100 (2)

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Related posts:

1. Maths worksheet: Multiply decimals
2. Maths worksheet: Divide decimals by 10 or 100
3. Year 4 maths worksheet: multiplying by 10 and 100

These are a useful couple of pages for children entering Year 3 next term. Counting on and back will still be important in year 3, using up to three digit numbers. Grouping into tens or fives and using tally charts are both effective ways of counting larger numbers.

Children seldom get a chance to count a larger number of objects – somewhere between 30 and 60. By seeing and counting this many they become more able to estimate larger numbers and be able to give rough approximations rather than wild guesses.

Try similar exercises with heaps of coins, counters etc, dividing them up into fives or tens. A really good idea is to collect change (pennies etc) and guess how much of any one coin there is.

Counting by grouping into tens

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Related posts:

1. Year 3 maths worksheet: Counting in tens
2. Year 2 maths worksheet: counting on in tens
3. Year 1 maths worksheet: counting on in tens

While the summer hasn’t seen a lot of worksheet updates, there have been a number of behind-the-scenes things going on. The site is now updated to WordPress 3.0 and migrated to a larger server to handle the increasing traffic. During busy school days we’re seeing as many as 4,000 visitors a day, and DadsWorksheets finally outgrew the shared hosting at BlueHost.com. Hello Slicehost!

Hope everyone’s summer has been outstanding and you’re practicing your math facts for back-to-school!

get the math worksheets here

Related posts:

1. Two Year Status Update!
2. General Worksheet Improvements, More Fractions Coming!
3. Fraction Comparison Worksheets Posted

Hope everyone’s summer vacation is going great! Keep practicing!

Comparing Fractions

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Related posts:

1. Fraction Comparison Worksheets Posted
2. Fraction Division Worksheets Posted!
3. Fraction Division Worksheets Posted!

A similar page to one posted earlier, this again looks at decimal fractions and how to manipulate them. The first set of questions involve changing decimals, using either the multiplication or division keys of the calculator, in just one step.

The second set of questions use the add or subtract keys.

Whilst the calculator is used, nevertheless a good understanding of number and place value is needed to be able to do these quickly and efficiently.

Decimals with a calculator (2)

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Related posts:

1. Year 6 maths worksheet: Decimal fractions
2. Maths worksheet: More multiplying decimals by 10 and 100
3. Year 3 maths worksheet: Make 12 investigation

While the summer hasn’t seen a lot of worksheet updates, there have been a number of behind-the-scenes things going on. The site is now updated to WordPress 3.0 and migrated to a larger server to handle the increasing traffic. During busy school days we’re seeing as many as 4,000 visitors a day, and DadsWorksheets finally outgrew the shared hosting at BlueHost.com. Hello Slicehost!

Hope everyone’s summer has been outstanding and you’re practicing your math facts for back-to-school!

get the math worksheets here

Related posts:

1. Two Year Status Update!
2. General Worksheet Improvements, More Fractions Coming!
3. Fraction Comparison Worksheets Posted

Here we have a rather nice number investigation for Year 3. Using exactly 5 of the cards, how many ways can 12 be made?

It is probably a good idea to cut out the cards, or make your own, to make it much easier to move the numbers around to make the number sentences.

As with all investigations look out for a  logical, well ordered method, although at the beginning most children will work in a random fashion (as will most adults.) Once it is clear that there are a number of 2-digit subtractions that can be done it is important to show them in some logical way so that it can be seen that all possible combinations have been covered.

Rules can be changed or adapted: one of the first questions which might come up is ‘Can I use the cards twice?’ In the case of adding three single digits the plus sign needs to be used twice, but children can make their own rules for this.

Make 12 investigation

get the math worksheets here

Related posts:

1. Year 1 maths worksheet: Money investigation
2. Year 6 investigation: World Cup Final
3. Year 3 Maths worksheet: What sign to use?

This is our second page on ratio and proportion, an area of maths which is less well covered than the traditional four rules but nevertheless involves key concepts.

An important part of this page is to be able to show the ratios in the simplest form. This process is similar to showing fractions in their simplest form, for example 6:4 can be simplified to 3:2 by dividing each by 2.

Remember, when finding the proportion of something the whole total of all items needs to be worked out. So to find what proportion of the total orders was tea, add up all the orders, which comes to 80. So the proportion of tea is 24/80. This can be simplified to 3/10.

Ratio and proportion (2)

get the math worksheets here

Related posts:

1. Year 5 maths worksheet: ratio and proportion
2. Year 6 maths worksheet: Interpret pie charts
3. Year 6 maths worksheet: Decimal fractions (2)

This can be quite a tricky subject for children to fully understand. If there are 6 yellow cubes and four blue cubes we can say that the ratio of yellow to blue is 6 to 4. This can be simplified to 3 to 2.

The proportion is usually written as a fraction of the whole lot, so the proportion of yellow cubes would be 6 out of 10, or when simplified, 3 out of 5. This can be written as a fraction 3/5.

In the same way, the proportion of blue cubes would be 4 out of 10 or 2 out of 5 (2/5).

A good way to check that the proportions are correct is to add the fractions which should make one.

3/5 + 2/5 = 5/5 or 1.

Ratio and proportion (1)

get the math worksheets here

Related posts:

1. Year 5 maths worksheet: ratio and proportion
2. Year 6 probability worksheet
3. Year 6 maths worksheet: Interpret pie charts

This is the second page of revising counting back in whole tens from any 2-digit or 3-digit number. Some children still find this difficult, especially when it involves crossing a hundreds boundary. If children do find this hard it is well worthwhile going back to a large number square and making sure that they are confident with counting on, crossing the hundreds boundary.

Revise counting back in tens (2)

get the math worksheets here

Related posts:

1. Year 3 maths worksheet: Counting in tens
2. Year 2 maths worksheet: counting on in tens
3. Year 3 maths worksheet: counting in tens