NUMBER SENTENCES AND PATTERNS

NUMBER SENTENCES AND PATTERNS

1. MATHEMATICS 1

2. NUMBER SENTENCES AND PATTERNS

3. What is a Number Sentence?

4. is a mathematical sentence, made up of numbers and signs. N UMBER S ENTENCE

5. it can use any of the mathematical operations from addition, subtraction, multiplication or division. N UMBER SENTENCE

6. 3 + 7 = 10 6 x 4 = 24 Examples: 15 – 5 = 10 20 ÷ 10 = 2

7. 3 + 7 = 10 6 + 4 = 10 Examples: 15 – 5 = 10 20 - 10 = 10

8. 3 + 7 = 10 6 + 4 = 10 Examples: 15 – 5 = 10 20 - 10 = 10 As you can observe, the number sentence above have the same answers. The sums on the blue box and on the green box are 10.

9. 3 + 7 = 10 6 + 4 = 10 Examples: 15 – 5 = 10 20 - 10 = 10 When the number sentences have the same answer, they are EQUAL.

10. 3 + 7 = 15 – 5 Examples: 6 + 4 = 20 - 10

11. Can you find other number sentence that have 10 as an answer?

12. 8 + 7 = 15 Can you find addends with the same sum?

13. 8 + 7 = 15 How about a subtraction sentence equal to this given addition sentence?

14. 16 - 5 = 11 Can you find other subtraction sentence that has the same difference?

15. 16 - 5 = 11 How about a addition sentence equal to this given subtraction sentence?

16. To form equal number sentences, you can also use patterns.

17. 0 + 10 = 10 1 + 9 = 10 2 + 8 = 10 3 + 7 = 10 4 + 6 = 10 5 + 5 = 10 To form equal number sentences, you can also use patterns. 4 + 6 = 10 3 + 7 = 10 2 + 8 = 10 1 + 9 = 10 10 + 0 = 10

18. 20 – 7 = 13 19 – 7 = 12 18 – 7 = 11 17 – 7 = 10 16 – 7 = 9 15 – 7 = 8 14 – 7 = 7 13 – 7 = 6 12 – 7 = 5 11 – 7 = 4

19. Can you find all addition sentences that the sum is 8?

20. MATHEMATICS 1