Sunday 21 October 2012

2nd grade questions continued

**1. Ask them, similar to 2s table, if there is a table that gives all odd numbers? (Tables from 1 to 10).

2. What happens if you multiply a number with zero? Generalize (without explanation) and make them understand. 
3. What happens if you add a number and zero? Generalize (without explanation) and make them understand. 
4. What happens if you subtract a number from itself? You get zero, generalize (without explanation) and make them understand. 
**5. Which number is in the multiplication tables of 2 and 3 (It is six)? (A little difficult question for pupils at this age to understand the relation between many variables). 
***6. Which number is in the tables of 2, 3, 4 and 5 (it is 60)? (If your kid answers this, without any help, then he/she is like a genius). 
7. Which numbers multiplication table can get 4 and 8? (Either 2 or 4). 
8. Which numbers multiplication table can get 3 and 6? (It is 3). 
9. What numbers do you get if you keep adding 2 to 1?
10. What numbers do you get if you keep adding 2 to 0 (or 2)? 
11. Tell them that, n * 2, and n + n are same, using examples (only, do not use algebraic symbols like n etc...). Similarly, try to generalize to n * 3 and n + n + n, like this, do till n * 6. 
Caution: Do not generalize the notions of LCM and GCD, these are not for the 2nd grade pupils. Without the knowledge of factorization, these do not make sense yet.

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