Powerpoint Subtraction Of Decimals L2

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Powerpoint Subtraction Of Decimals L2

  1. 1. Adult numeracy Level 2 Subtraction of Decimals
  2. 2. Decimals at Level 2 <ul><li>At level 2 we should be able to add and subtract decimals up to three decimal places </li></ul><ul><li>A Decimal place is the position of the digit to the right of the decimal point, you should recognise these values as tenths, hundredths, and thousandths </li></ul>
  3. 3. Decimals at Level 2 <ul><li>For example; Let’s consider a piece of cloth that measures 42cm long, in metres this is 0.42m. </li></ul><ul><li>If we were then to cut off a length of 228mm from the cloth, to calculate the remaining length we need to perform the following calculation </li></ul><ul><li>0.42-0.228=? </li></ul>
  4. 4. <ul><li>0.420 </li></ul><ul><li>0.228 </li></ul>We start by setting out the calculation in the usual way, keeping the decimals in line Notice that we have added a zero after the 0.42 to keep the place values correct
  5. 5. <ul><li>0.420 </li></ul><ul><li>0.228 </li></ul>We cannot subtract the eight from the two (Thousandths) so we borrow one of the hundredths from the next column Note; one hundredth is the same as ten thousandths
  6. 6. <ul><li>0.420 </li></ul><ul><li>0.228 </li></ul>We cannot subtract the two from the one(hundredths) so we borrow one of the tenths from the next column Note; one tenth is the same as ten hundreths
  7. 7. <ul><li>0.420 </li></ul><ul><li>0.228 </li></ul>It now just remains for us to subtract the two tenths from the remaining three tenths Answer; the remaining cloth is 0.192m long

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