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1) Say the counting numbers and stop at the number up to which you have to find the before number.

Say 1,2,3,4,5,6,7,8,9 so before 9 we said 8 so 8 is the predecessor of 9.

2) If you want to find the predecessor of given number then subtract 1 from the given number.

Example : 1) Predecessor of 9 is 9 -1 = 8

2) Predecessor of 13 is 13 – 1 = 12

3) Predecessor of 20 is 20 -1 = 19

1) Say the counting numbers and stop at the given number and say the next number that will be the successor of the given number.

Say 1,2,3,4,5,6,7,8,9,10,11,12 and then the next number is 13 so 13 is the successor of 12.

But this method is used only for small numbers. 2) For big numbers the successor is the number obtained by adding 1 to it.

b) The successor of 0 is 0 + 1 = 1.

c) Successor of 7 is 7 + 1 = 8

d) Successor of 56 is 56 + 1= 57.

Find before or after number.

1) ____,12

2) 16,____

3) 1,____

4) 18,_____

5) ___,9

6) ____,1

7) 19,____

8) 3,_____

9) _____,8

10) _____,20

1st Grade Math

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