The concept on skip counting by 12’s or twelves 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 twelves up to tens times.
Skip counting by 12’s up to 10 times –
12, 1 time |
24, 2 time |
36, 3 time |
48, 4 time |
60, 5 time |
72, 6 time |
84, 7 time |
96, 8 time |
108, 9 time |
120, 10 time |
I. Now look at the chart above where every twelfth number is in dark yellow color and fill in the blanks below:
(i) 12 × 3 = _____ (iv) 12 × 5 = _____
(vii) 12 × 7 = _____ (x) 12 × 2 = _____ (xiii) 12 × 6 = _____ |
(ii) 12 × 1 = _____ (v) 12 × 9 = _____
(viii) 12 × 4 = _____ (xi) 12 × 7 = _____ (xiv) 12 × 8 = _____ |
(iii) 12 × 10 = _____ (vi) 12 × 0 = _____
(ix) 12 × 12 = _____ (xii) 12 × 9 = _____ (xv) 12 × 11 = _____ |
II. Complete the skip counting series by 12s:
(i) 24, ____, ____, 60, ____, ____, ____, 108.
(ii) 0, ____, ____, 36, ____, ____, 72, 84.
(iii) 72, ____, ____, ____, ____, 132, 144.
(iv) ____, ____, ____, ____, 96, ____, ____, 132.
(v) ____, ____, ____, 48, 60, ____, ____.
(vi) 72, ____, 96, ____, ____, 132, 144, ____.
(vii) 36, ____, ____, ____, 84, ____, ____, 120.
(viii) ____, 24, ____, ____, ____, 72, 84, ____.
(ix) ____, ____, 36, 48, ____, ____, ____, 96.
(x) ____, ____, 72, 84, ____, ____, ____, 132.
Answers:
I. (i) 36 (iv) 60
(vii) 84 (x) 24 (xiii) 72 |
(ii) 12 (v) 108
(viii) 48 (xi) 84 (xiv) 96 |
(iii) 120 (vi) 0
(ix) 144 (xii) 108 (xv) 132 |
II. (i) 24, 36, 48, 60, 72, 84, 96, 108.
(ii) 0, 12, 24, 36, 48, 60, 72, 84.
(iii) 72, 84, 96, 108, 120, 132, 144.
(iv) 48, 60, 72, 84, 96, 108, 120, 132.
(v) 12, 24, 36, 48, 60, 72, 84.
(vi) 72, 84, 96, 108, 120, 132, 144, 156.
(vii) 36, 48, 60, 72, 84, 96, 108, 120.
(viii) 12, 24, 36, 48, 60, 72, 84, 96.
(ix) 12, 24, 36, 48, 60, 72, 84, 96.
(x) 48, 60, 72, 84, 96, 108, 120, 132.
2nd Grade Math Practice
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