The concept on skip counting by 15’s or fifteens 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 fifteens up to tens times.
Skip counting by 15’s up to 10 times –
15, 1 time 
30, 2 time 
45, 3 time 
60, 4 time 
75, 5 time 
90, 6 time 
105, 7 time 
120, 8 time 
135, 9 time 
150, 10 time 
I. Now look at the chart above where every fifteenth number is in dark yellow color and fill in the blanks below:
(i) 15 × 12 = _____ (iv) 15 × 8 = _____ (vii) 15 × 9 = _____ (x) 15 × 0 = _____
(xiii) 15 × 1 = _____ 
(ii) 15 × 9 = _____ (v) 15 × 3 = _____ (viii) 15 × 11 = _____
(xi) 15 × 7 = _____ (xiv) 15 × 5 = _____ 
(iii) 15 × 10 = _____ (vi) 15 × 4 = _____ (ix) 15 × 6 = _____ (xii) 15 × 2 = _____
(xv) 15 × 7 = _____ 
II. Complete the skip counting series by 14s:
(i) 45, ____, ____, ____, 105, 120, ____, ____.
(ii) 30, ____, ____, 75, 90, ____, ____, ____.
(iii) 60, ____, ____, ____, ____, 135, 150.
(iv) ____, ____, ____, ____, 105, 120.
(v) ____, ____, ____, 120, 135, 150, ____.
(vi) 75, ____, 105, ____, ____, 150, 165.
(vii) 15, ____, ____, ____, 75, ____, ____, 120.
(viii) ____, ____, ____, ____, 90, 105, ____.
(ix) ____, ____, ____, ____, ____, 165, 180.
(x) 0, 15, ____, ____, 60, ____, ____, ____.
Answers:
I. (i) 180 (iv) 120
(vii) 135 (x) 0 (xiii) 15 
(ii) 135
(v) 45 (viii) 165 (xi) 105 (xiv) 75 
(iii) 150
(vi) 60 (ix) 90 (xii) 30 (xv) 105 
II. (i) 45, 60, 75, 90, 105, 120, 135, 150.
(ii) 30, 45, 60, 75, 90, 105, 120, 135.
(iii) 60, 75, 90, 105, 120, 135, 150.
(iv) 45, 60, 75, 90, 105, 120.
(v) 75, 90, 105, 120, 135, 150, 165.
(vi) 75, 90, 105, 120, 135, 150, 165.
(vii) 15, 30, 45, 60, 75, 90, 105, 120.
(viii) 30, 45, 60, 75, 90, 105, 120.
(ix) 90, 105, 120, 135, 150, 165, 180.
(x) 0, 15, 30, 45, 60, 75, 90, 105.
2nd Grade Math Practice
From Skip Counting by 15's to HOME PAGE
Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.

New! Comments
Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.