Column addition and subtraction

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Presentation transcript:

Column addition and subtraction We have learnt to add and subtract vertically in columns Can you remember the main things to remember? © www.SaveTeachersSundays.com 2013

Column addition and subtraction Start on the right-hand side Put only 1 number in a square Write the + / - Put units under units and tens under tens Write the 1 that you carry / borrow 47 + 25 282 - 57 © www.SaveTeachersSundays.com 2013

Column addition - carrying When two digits in a column add up to 10 or more then we need to ‘carry’ T U 53 + 17 5 3 + 1 7 7 1 © www.SaveTeachersSundays.com 2013

Column subtraction - borrowing When the bottom digit in a column is greater than the top number we need to ‘borrow’ T U 52 - 25 4 5 1 2 - 2 5 2 7 © www.SaveTeachersSundays.com 2013

62 + 4 © www.SaveTeachersSundays.com 2013

93 - 7 © www.SaveTeachersSundays.com 2013

46 + 89 © www.SaveTeachersSundays.com 2013

476 - 42 © www.SaveTeachersSundays.com 2013

573 + 41 © www.SaveTeachersSundays.com 2013

761 - 256 © www.SaveTeachersSundays.com 2013

3.12 + 4.69 © www.SaveTeachersSundays.com 2013

5.43 – 1.7 © www.SaveTeachersSundays.com 2013

Column addition and subtraction Start on the right-hand side Put only 1 number in a square Write the + / - Put units under units and tens under tens Write the 1 that you carry / borrow (if you need to) 47 + 25 282 - 57 © www.SaveTeachersSundays.com 2013