Skip Counting by 3's
The concept on skip counting by 3’s or threes 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 threes up to 33 times.
Skip counting by 3’s up to 33 times –
|
3, 1 time |
6, 2 time |
9, 3 time |
12, 4 time |
15, 5 time |
|
18, 6 time |
21, 7 time |
24, 8 time |
27, 9 time |
30, 10 time |
|
33, 11 time |
36, 12 time |
39, 13 time |
42, 14 time |
45, 15 time |
|
48, 16 time |
51, 17 time |
54, 18 time |
57, 19 time |
60, 20 time |
|
63, 21 time |
66, 22 time |
69, 23 time |
72, 24 time |
75, 25 time |
|
78, 26 time |
81, 27 time |
84, 28 time |
87, 29 time |
90, 30 time |
|
93, 31 time |
96, 32 time |
99, 33 time |
I. Now look at the chart above where every third number is in dark yellow color and fill in the blanks below:
|
(i) 3 × 32 = _____ (iv) 3 × 14 = _____
(vii) 3 × 26 = _____ (x) 3 × 29 = _____ (xiii) 3 × 15 = _____ |
(ii) 3 × 33 = _____ (v) 3 × 19 = _____ (viii) 3 × 22 = _____ (xi) 3 × 30 = _____
(xiv) 3 × 11 = _____ |
(iii) 3 × 23 = _____ (vi) 3 × 17 = _____
(ix) 3 × 28 = _____ (xii) 3 × 20 = _____ (xv) 3 × 25 = _____ |
II. Complete the skip counting series by 3s:
(i) 0, 3, 6, ____, ____, ____, ____, ____.
(ii) 21, 24, ____, ____, ____, ____, 39, ____.
(iii) 18, ____, ____, ____, ____, 33, ____, ____.
(iv) ____, ____, ____, ____, 57, ____, ____, 66.
(v) ____, ____, ____, ____, 72, 75, ____, 81.
(vi) 78, 81, ____, ____, ____, 93, ____, ____.
(vii) 66, ____, ____, ____, ____, 81, 84, ____.
(viii) 42, 45, ____, ____, ____, ____, ____, 63.
(ix) ____, ____, 36, 39, ____, ____, ____, 51.
(x) ____, ____, ____, ____, 60, 63, ____, 69.
Answers:
|
I. (i) 96 (iv) 42 (vii) 78 (x) 87 (xiii) 45 |
(ii) 99 (v) 57
(viii) 66 (xi) 90 (xiv) 33 |
(iii) 69 (vi) 51
(ix) 84 (xii) 60 (xv) 75 |
II. (i) 0, 3, 6, 9, 12, 15, 18, 21.
(ii) 21, 24, 27, 30, 33, 36, 39, 42.
(iii) 18, 21, 24, 27, 30, 33, 36, 39.
(iv) 45, 48, 51, 54, 57, 60, 63, 66.
(v) 60, 63, 66, 69, 72, 75, 78, 81.
(vi) 78, 81, 84, 87, 90, 93, 96, 99.
(vii) 66, 69, 72, 75, 78, 81, 84, 87.
(viii) 42, 45, 48, 51, 54, 57, 60, 63.
(ix) 30, 33, 36, 39, 42, 45, 48, 51.
(x) 48, 51, 54, 57, 60, 63, 66, 69.
2nd Grade Math Practice
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