Maths Resources > Free Worksheets Maths: with a calculator

Free Worksheets Maths: with a calculator

Posted by Peter on 23rd June 2009
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Y4 Using a Calculator: Take 10

take-10-calculatorHere is the second of our mini series on using a calculator to check the results of mental calculations. In this case 10 has to be n from various numbers , including six digit numbers. Whilst doing these it would be a great idea to practice saying these larger numbers out loud, as many children find this quite difficult and get little chance to practice.

The calculator can be made into a ‘take 10′ machine. With many calculators by keying in the minus sign (-) followed by 10 then the equals sign the answer -10 is shown. Ignore this, don’t clear the answer, and type in another number eg 450 and press the equals sign and the answer will come up (440).

This calculator worksheet can be used by children of different ages, depending on their ability to read and work with large numbers.

Using a calculator: Take 10

Find this worksheet in Year 4 Using and Applying Maths

Download “Take 10 Calculator”File Size: 72.65 KB
Posted by Peter on 15th June 2009
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Using a calculator: Take 1

take-1-calcMost children have access to a calculator, and there are very good reasons why their use should be encouraged. However, there is still a great deal of opposition to them. I certainly would not advocate their use to solve simple sums which can be done mentally or on paper, but they are great for investigations and improving attitudes to maths.

This first calculator page uses the calculator as a quick check for mental arithmetic. Taking one from a number might appear very easy, but with large numbers such as 20200 it requires a good knowledge of place value.

This page also introduces the idea of the calculator as a function machine, in this case a ‘take 1′ machine. With many calculators by keying in the minus sign (-) followed by 1 then the equals sign the answer -1 is shown. Ignore this, don’t clear the answer, and type in another number eg 450 and press the equals sign and the answer will come up (449). Continuing in this way saves time as it more than halves the number of entries to type in. It can, of course be applied to any subtraction which has to be done on numerous occasions.

Using a calculator: Take 1

Download “Take 1”File Size: 72.44 KB