Adding and Subtracting (Understanding Maths)

by KarenBryant-Mole (Author)

• Used

  Hardcover
  1991

  $3.36

  Adding up and taking away numbers are part of many everyday activities. This book uses such examples to illustrate making numbers, rounding numbers, writing and checking sums, adding and taking away with regrouping and dealing with tens and hundreds, decimals and time. The book introduces the idea of adding numbers by showing how different combinations of coins can be used to make the same amount of money. It goes on to explain the rules of rounding numbers up or down to the nearest ten or hundred, then shows the reader how to write sums using columns. It explains how to carry over numbers to and from columns, regrouping, and makes the handling of hundreds and decimals easy to understand. A train journey is used to show how intervals of time can be calculated.