Written Methods Addition Adding Big Numbers Decimals of
Written Methods Addition • Adding Big Numbers • Decimals of differing place value
Addition 82564 + 6987 636047 + 36564 63. 5 + 6. 549 + 40 568 + 12 - 433
Addition 89551 672611 110. 049 147
Common misconceptions & mistakes 1. Place value knowledge
Common misconceptions & mistakes 2. Digits in correct columns E. g. 423+37= 427 + 37 264+12= 264 + 12
Common misconceptions & mistakes 3. Remember to add on exchanged numbers E. g. 1389+245= 1389 + 245 Exchanged number X NOT 1389+245= 1389 + 245 1 5 34 1 1 5 314
Common misconceptions & mistakes 4. Key vocabulary e. g. exchanging and not borrowing (as the digit exchanged will not be given back)
Common misconceptions & mistakes 5. Read question carefully (e. g. + and not )
Written Methods Subtraction • Subtracting Big Numbers • Decimals of differing place value
Common misconceptions & mistakes 1. Place value knowledge
Common misconceptions & mistakes 2. Digits in correct columns E. g. X NOT 327 -41= 327 - 41 X NOT 895 -52= 895 - 52
Common misconceptions & mistakes 3. Exchange carefully, especially across 2 digits E. g. 2300 -378= 2300 - 378 1 2 91 1922
Common misconceptions & mistakes 4. Subtracting the smallest number away from the biggest number E. g. 5651 -4352= X 4352 - 5651
Common misconceptions & mistakes 5. Swapping numbers over E. g. 5241 -4396= 5241 -4396 Do not just swap the 1 and 6 so that it is possible. It is 1 -6 not 6 -1
Common misconceptions & mistakes 6. Read question carefully (e. g. - and not +)
Subtraction 136096 – 54879 16. 7 – 8. 99 12 – 5. 04 14 – 2. 43
Subtraction 81217 7. 71 6. 96 11. 57
Mymaths. co. uk Login- walkwood Password- multiply Select Number- Number: Written Methods for………
- Slides: 18