Page 173 - New Medley 4 Semester 2 PDF (Merged)

3. 1091, 1081, 1071, 1061, , , ,

4. 965, 865, 765, 665, , , ,

5. 10, 30, 90, 270, , , ,

6. 1, 2, 4, 8, 16, , , ,

B. Observe the number patterns and fill in the blanks.
1. 1 + 2 + 3 + 4 + 5 = 15 2. 1 – 2 + 3 – 4 + 5 – 6 + 7 = 4

2 + 3 + 4 + 5 + 6 = 20 2 – 3 + 4 – 5 + 6 – 7 + 8 = 5
3 + 4 + 5 + 6 + 7 = 3 – 4 + 5 – 6 + 7 – 8 + 9 =

4 + 5 + 6 + 7 + 8 = 4 – 5 + 6 – 7 + 8 – 9 + 10 =
5 + 6 + 7 + 8 + 9 = 5 – 6 + 7 – 8 + 9 – 10 + 11 =

3. (10 – 1) ÷ 9 = 1 4. 1 × 8 + 1 = 9
(100 – 1) ÷ 9 = 11 12 × 8 + 2 = 98

(1000 – 1) ÷ 9 = 111 123 × 8 + 3 = 987
(10000 – 1) ÷ 9 = 1234 × 8 + 4 =

(100000 – 1) ÷ 9 = 12345 × 8 + 5 =
( ) ÷ 9 = 111111 123456 × 8 + = 987654

C. 1. 1 = 1
1 + 3 = 4

1 + 3 + 5 = 9
1 + 3 + 5 + 7 = 16

Write the next four rows of the given number pattern.

2. 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55
11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 20 = 155

21 + 22 + 23 + 24 + 25 + 26 + 27 + 28 + 29 + 30 = 255

Write the next four rows of the number pattern.

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