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# Teaching 1

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### Teaching 1

1. 1. What is Listening? • Listening means understanding.
2. 2. SHORT TIME MEMORY Remember 25 words
3. 3. TABLES • How to make table up to 100
4. 4. After learning this you will be able to find square of a number ending with 5 say 25, 35, 45 etc. Say you want to find square of 85 Do the following: · Multiply 5 by 5 and put 25 as your right part of the answer. · Multiply 8 by the next higher digit i.e. 9 and put 72 as your left part of the answer. · Your answer is 7225 You can use this formula to find square of any number ending with 5.
5. 5. SQUARE ROOT ENDING WITH 0 First digit squaqre & put 00 e.g. 30=900 40=1600
6. 6. Square of other number Steps. 1. Square of last digit. 2. Both number multiply & double. 3. Square of first digit. e.g. 48=2304 . 8 square is 64 so put 4 & carry 6 . 4 multiply by 8 & double plus carry =32+32+6 is 70 so put 0 & 7 carry. . 4 square is 16 + carry 7 = 23.
7. 7. A man has 49 cows. The first cow gives one litre milk, the second cow gives 2 litre of milk, the third cow gives 3 litre milk & so on up to the forty-ninth cow which gives 49 litre of milk. This man has 7 sons. He want to divide the 49 cows with his 7 sons in such a manner that the each child receives the same number of cows & the same quantity of milk. Can you help him to do it?
8. 8. 1) Start middle of right hand. 2) L from all right column to left. 3) L from up column to down column. 4) Next upper column. 5) One step back.
9. 9. Learn how to make Cub.
10. 10. Addition from other side.
11. 11. TO MULTI- PLY BY THE PROCEDURE IS THIS: MULTIPLICATION BY ELEVEN Add the neighbour. Each successive number of the multiplicand is added to its neighbour at the right.
12. 12. MULTIPLICATION BY TWELVE Double each number in turn and add its neighbour. This is the same as multiplying by 11 except that now we double the "number" before we add its "neighbour."
13. 13. o Zero times any number at all is zero.
14. 14. 1 Copy down the multiplicand unchanged.
15. 15. 2 Double each digit of the multiplicand.
16. 16. 3 First step: subtract from 10 and double, and add 5 if the number is odd. Middle steps: subtract from 9 and double, add 5 if the number is odd, and add "half" the neighbour. Last step: take "half" the left-hand digit of the multiplicand and reduce by 2.
17. 17. 4 First step: subtract from 10, and add 5 if the number is odd. Middle steps: subtract from 9 and add "half" the neighbour, plus 5 if the number is odd. Last step: take "half" the left-hand of the multiplicand and reduce by l.
18. 18. 5 Use "half" the neighbour, plus 5 if the number is odd.
19. 19. 6 Add 5 to the number if the number is odd; add nothing if it is even. Add "half" the neighbour (dropping fractions, if any).
20. 20. 7 Double the number and add 5 if the number is odd, and add "half" the neighbour.
21. 21. 8 First step: subtract from 10 and double. Middle steps: subtract from 9, double, and add the neighbour. Last step: reduce left-hand digit of multiplicand by 2.
22. 22. 9 First step: subtract from 10. Middle steps: subtract from 9 and add the neighbour. Last step: reduce left-hand digit of multiplicand by l.