The concept on skip counting by 10’s or tens 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 tens up to tens times.
Skip counting by 10’s up to 10 times –
10, 1 time 
20, 2 time 
30, 3 time 
40, 4 time 
50, 5 time 
60, 6 time 
70, 7 time 
80, 8 time 
90, 9 time 
100, 10 time 
I. Now look at the chart above where every tenth number is in dark yellow color and fill in the blanks below:
(i) 10 × 3 = _____ (iv) 10 × 7 = _____
(vii) 10 × 5 = _____ (x) 10 × 8 = _____ (xiii) 10 × 9 = _____ 
(ii) 10 × 6 = _____ (v) 10 × 0 = _____
(viii) 10 × 4 = _____ (xi) 10 × 10 = _____ (xiv) 10 × 2 = _____ 
(iii) 10 × 1 = _____ (vi) 10 × 11 = _____
(ix) 10 × 9 = _____ (xii) 10 × 7 = _____ (xv) 10 × 12 = _____ 
II. Complete the skip counting series by 10s:
(i) 10, ____, 30, ____, ____, ____, ____, 80.
(ii) 0, ____, ____, ____, ____, 50, ____, 70.
(iii) 70, ____, ____, ____, ____, 120, ____, 140.
(iv) ____, ____, ____, ____, 90, ____, ____, 120.
(v) ____, ____, ____, ____, 70, 80, ____, ____.
(vi) 80, ____, 100, ____, ____, 130, ____, ____.
(vii) 50, ____, ____, 80, ____, 100, ____, ____.
(viii) ____, 20, ____, ____, ____, 60, ____.
(ix) ____, ____, ____, 40, ____, ____, ____, 80.
(x) ____, ____, ____, ____, 90, 100, ____, 120.
Answers:
I. (i) 30 (iv) 70
(vii) 50 (x) 80 (xiii) 90 
(ii) 60 (v) 0
(viii) 40 (xi) 100 (xiv) 20 
(iii) 10 (vi) 110
(ix) 90 (xii) 70 (xv) 120 
II. (i) 10, 20, 30, 40, 50, 60, 70, 80.
(ii) 0, 10, 20, 30, 40, 50, 60, 70.
(iii) 70, 80, 90, 100, 110, 120, 130, 140.
(iv) 50, 60, 70, 80, 90, 100, 110, 120.
(v) 30, 40, 50, 60, 70, 80, 90, 100.
(vi) 80, 90, 100, 110, 120, 130, 140, 150.
(vii) 50, 60, 70, 80, 90, 100, 110, 120.
(viii) 10, 20, 30, 40, 50, 60, 70.
(ix) 10, 20, 30, 40, 50, 60, 70, 80.
(x) 50, 60, 70, 80, 90, 100, 110, 120.
2nd Grade Math Practice
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