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To find near doubles.

Published byBryce Spencer Modified over 6 years ago

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Presentation on theme: "To find near doubles."— Presentation transcript:

1 To find near doubles

2 First try these: 10+10= 20 16 8+8= 5+5= 10 14 7+7=

3 Now try these: 15+15= 30 12 6+6= 12+12= 24 20+20= 40

4 If 7+7= 14 What would 7+8 be? 15 What would 7+6 be? 13

5 If 5+5= 10 What would 5+6 be? 11 What would 4+5 be? 9

6 If 12+12= 24 What would be? 23 What would be? 25

7 If 15+15= 30 What would be? 31 What would be? 29

8 If 12+12= 24 What would be? 23 What would be? 25

9 If 32+32= 64 What would be? 65 What would be? 64

10 If 20+20= 40 What would be? 39 What would be? 40

11 Which double number would help?
21+19 Which double number would help? 20+20= 40 21+19= 40 41 22+19=

12 Which double number would help?
61+59 Which double number would help? 60+60= 120 61+59= 120 63+59= 122

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