The concept on skip counting by 9’s or nines is an essential skill to learn when making the jump from counting to basic addition.
The sequence chart will help us to write the number to complete the series which involves skip counting by nines up to 11 times.
Skip counting by 9’s up to 11 times –
9, 1 time 
18, 2 time 
27, 3 time 
36, 4 time 
45, 5 time 
54, 6 time 
63, 7 time 
72, 8 time 
81, 9 time 
90, 10 time 
99, 11 time 
I. Now look at the chart above where every ninth number is in dark yellow color and fill in the blanks below:
(i) 9 × 3 = _____ (iv) 9 × 7 = _____
(vii) 9 × 5 = _____ (x) 9 × 8 = _____ (xiii) 9 × 9 = _____ 
(ii) 9 × 6 = _____ (v) 9 × 0 = _____
(viii) 9 × 4 = _____ (xi) 9 × 10 = _____ (xiv) 9 × 2 = _____ 
(iii) 9 × 1 = _____ (vi) 9 × 11 = _____
(ix) 9 × 9 = _____ (xii) 9 × 7 = _____ (xv) 9 × 12 = _____ 
II. Complete the skip counting series by 9s:
(i) 27, ____, 45, ____, ____, ____, ____, 90.
(ii) 9, 18, ____, ____, ____, ____, 63, ____.
(iii) 36, ____, ____, ____, ____, 81, ____, ____.
(iv) ____, ____, ____, ____, 54, ____, ____, 81.
(v) ____, ____, ____, ____, 72, ____, 90, ____.
(vi) 0, 9, ____, ____, ____, 45, ____, ____.
(vii) 45, ____, ____, ____, ____, 90, 99, ____.
(viii) ____, 18, ____, ____, ____, ____, 63, ____.
(ix) ____, ____, ____, 36, ____, ____, ____, 72.
(x) ____, ____, ____, ____, 90, 99, ____, 117.
Answers:
I. (i) 27 (iv) 63
(vii) 45 (x) 72 (xiii) 81 
(ii) 54 (v) 0
(viii) 36 (xi) 90 (xiv) 18 
(iii) 9 (vi) 99
(ix) 81 (xii) 63 (xv) 108 
II. (i) 27, 36, 45, 54, 63, 72, 81, 90.
(ii) 9, 18, 27, 36, 45, 54, 63, 72.
(iii) 36, 45, 54, 63, 72, 81, 90, 99.
(iv) 18, 27, 36, 45, 54, 63, 72, 81.
(v) 36, 45, 54, 63, 72, 81, 90, 99.
(vi) 0, 9, 18, 27, 36, 45, 54, 63.
(vii) 45, 54, 63, 72, 81, 90, 99, 108.
`2nd Grade Math Practice
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