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.
Counting by Tens:
Count and trace the numbers.
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.
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