kindergarten math

Counting

100

1 2 3 4 _ 6 7 8 9 10 

5

200

10 11 12 13 14 15 _  17 18 19 20

16

300

21 22 23 24 25 26 _ 28 29 30 

27

400

90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 100 109 110 111 112 

What is the wrong number in the counting  

100

500

bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob bob --------------------------------------------------------How many time did I type bob 

71

adding

100

7+3=

10 

200

6+1=

7

300

5+4=

9

400

100+100=

200

500

now do you know what is the answer for 500 countings put in that number and add that by 10

81

subtracting

100

4-3=

1

200

6-2=

4

300

8-6=

2

400

7-5=

2

500

8-3=

5