Finding efficient methods

Mathematics · Mathematical Thinking · ages 5-6

Name ______________________ Date ____________

Add 1 to 7. What do you get?
Answer: ______________
Count 2, 4, 6, 8. Each number is 2 more than the last. Is that right?
Circle one: True False
Skip count by 2s: 2, 4, 6, 8, ___. What comes next?
- 10
- 9
- 11
Skip counting by 2s from 2 gives 2, 4, 6, 8. These are all even numbers.
Circle one: True False
Skip count by 2s starting at 5: 5, 7, 9, ___. What comes next?
- 10
- 11
- 12
On a hundred chart, adding 10 moves you...
- down one row
- up one row
- right one column
- nowhere
Skip count by 2s: 10, 12, 14. What is next?
Answer: ______________
Emma counts: 12, 13, 14, ___. What number comes next?
- 13
- 16
- 15
Jay skip counts by 2s: 4, 6, 9, 10. Which number breaks the pattern?
- 6
- 10
- 9
To add 9 + 3, counting on 10, 11, 12 from 9 is faster than counting 1 to 12 from the start. Is that right?
Circle one: True False

Answer key

For grown-ups. Fold this page away before handing over the rest.

8 · 7 plus 1 is 8, the next number.
True · Right. Every step adds exactly 2.
10 · Each jump adds 2, so after 8 comes 10.
True · Starting at an even number and adding 2 each time keeps you on even numbers.
11 · Counting by 2s from an odd number keeps giving odd numbers, so 11 comes next.
down one row · Plus 10 drops exactly one row down.
16 · 14 plus 2 is 16.
15 · Adding 1 to 14 gives 15, the next counting number.
9 · Each jump should add 2, but 6 to 9 adds 3. That number breaks the pattern.
True · Right. Counting on takes three steps instead of twelve.