Complete the Patterns

Addition

100

2, 4, 6, 8, ________

10

200

30, 40, 50, 60, 70, ______

80

300

20, 25, 30, 35, 40, 45, ___________

50

400

500, 600, 700, 800, 900, _________

1,000

500

25, 50, 75, 100, 125, ________

150

Subtraction

100

13, 11, 9, 7, ________

5

200

50, 45, 40, 35, 30, 25 ____________

20

300

23, 20, 17, 14, 11, ________

8

400

650, 550, 450, 350, 250, _______

150

500

180, 150, 120, 90, 60 _______

30

Double Addition

100

8, 10, 11, 13, 14, 16, 17 ___________

(Hint: +2, +1, +2, +1, +2, +1 )

19

200

1, 4, 9, 12, 17, ________

(Hint: +3, +5, +3, +5, +3, +5 )

20

300

10, 20, 22, 32, 34, 44, 46, ________

(Hint: +10, +2 )

56

400

10, 11, 31, 32, 52, 53 ______

(Hint: +1, +20 )

73

500

100, 200, 250, 350, 400, __________

500

Double Subtraction

100

20, 18, 17, 15, 14, 12, _________

(Hint: -2, - 1, -2, -1, -2, -1 )

11

200

50, 40, 35, 25, 20 _______

(Hint: -10, - 5, -10, -5, -10, -5 )

10

300

20, 17, 15, 12, 10, ____

(Hint: -3, - 2, -3, -2 )

7

400

30, 29, 25, 24, 20 ________

(Hint: -1, - 4 )

19

500

50, 40, 38, 28, 26, 16 _________

14

Combination

100

8, 11, 7, 10, 6, 9 _____

(Hint: +3, - 4)              
                        

                                   

    

5

200

3, 10, 9, 16, 15, 22 _________      

(Hint: +7, -1)             
                        

                                   

    

21

300

1, 7, 2, 8, 3, 9 ______                 

(Hint: +6, - 5)                                   

    

4

400

25,  28,  22,  25,  19 _______             

                                   

    

22

500

21, 25, 24, 28, 27, 31 _______                                                 

    

30