The concept on skip counting by 7’s or sevens 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 sevens up to 14 times.
Skip counting by 7’s up to 14 times –
7, 1 time |
14, 2 time |
21, 3 time |
28, 4 time |
35, 5 time |
42, 6 time |
49, 7 time |
56, 8 time |
63, 9 time |
70, 10 time |
77, 11 time |
84, 12 time |
91, 13 time |
98, 14 time |
I. Now look at the chart above where every seventh number is in dark yellow color and fill in the blanks below:
(i) 7 × 10 = _____
(iv) 7 × 7 = _____ (vii) 7 × 13 = _____ (x) 7 × 1 = _____ (xiii) 7 × 8 = _____ |
(ii) 7 × 5 = _____
(v) 7 × 11 = _____ (viii) 7 × 12 = _____ (xi) 7 × 14 = _____ (xiv) 7 × 2 = _____ |
(iii) 7 × 9 = _____
(vi) 7 × 13 = _____ (ix) 7 × 4 = _____ (xii) 7 × 3 = _____ (xv) 7 × 6 = _____ |
II. Complete the skip counting series by 7s:
(i) 21, 28, 35, ____, ____, ____,
(ii) 63, 70, ____, ____, 91, ____.
(iii) 28, ____, ____, ____, 56, ____.
(iv) ____, ____, 49, ____, ____, 70.
(v) ____, ____, ____, 77, 84, ____, 98.
(vi) 21, 28, ____, ____, 49, ____.
(vii) 7, ____, ____, 28, 35, ____.
(viii) 42, 49, ____, ____, ____, 77.
(ix) ____, ____, 35, ____, ____, ____, 63.
(x) ____, ____, ____, 56, 63, ____, 77.
Answers:
(i) 70 (iv) 49
(vii) 91 (x) 7 (xiii) 56 |
(ii) 35 (v) 77
(viii) 84 (xi) 98 (xiv) 14 |
(iii) 63
(vi) 91 (ix) 28 (xii) 21 (xv) 42 |
II. (i) 21, 28, 35, 42, 49, 56,
(ii) 63, 70, 77, 84, 91, 98.
(iii) 28, 35, 42, 49, 56, 63.
(iv) 35, 42, 49, 56, 63, 70.
(v) 56, 63, 70, 77, 84, 91, 98.
(vi) 21, 28, 35, 42, 49, 56.
(vii) 7, 14, 21, 28, 35, 42.
(viii) 42, 49, 56, 63, 70, 77.
(ix) 21, 28, 35, 42, 49, 56, 63.
(x) 35, 42, 49, 56, 63, 70, 77.
2nd Grade Math Practice
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