Grade 4 Patterns: Number Patterns

Worked examples

Real problems from the practice worksheets, solved one step at a time.

1. Example 1

   202224?28?

   Fill in the missing terms

   1. Compare numbers that sit next to each other: 20 → 22 is +2, 22 → 24 is +2.
   2. The rule is add 2: each number is 2 more than the one before.
   3. Use the rule to fill the blanks: 24 + 2 = 26 (check: 26 + 2 = 28, the next number ✓); 28 + 2 = 30.
   4. So the missing numbers are 26, 30.

   Answer: 26, 30

2. Example 2

   91929?49?

   Fill in the missing terms

   1. Compare numbers that sit next to each other: 9 → 19 is +10, 19 → 29 is +10.
   2. The rule is add 10: each number is 10 more than the one before.
   3. Use the rule to fill the blanks: 29 + 10 = 39 (check: 39 + 10 = 49, the next number ✓); 49 + 10 = 59.
   4. So the missing numbers are 39, 59.

   Answer: 39, 59

3. Example 3

   141924?34?

   Fill in the missing terms

   1. Compare numbers that sit next to each other: 14 → 19 is +5, 19 → 24 is +5.
   2. The rule is add 5: each number is 5 more than the one before.
   3. Use the rule to fill the blanks: 24 + 5 = 29 (check: 29 + 5 = 34, the next number ✓); 34 + 5 = 39.
   4. So the missing numbers are 29, 39.

   Answer: 29, 39