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3 Cards in this Set
- Front
- Back
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What is the primary purpose of drill of basic facts?
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• Students have to have this base knowledge in order to be able to do math at later levels. Students have to be quick with the basic facts to have success.
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Identify basic fact strategies for addition (adding to 10, doubles, counting on, commutativity)
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• Adding to 10: 8+5= (8+2)+3= 10+3=13
• Doubles: Knowing that 4+4=8 6+6=12 7+8 = 7+7+1 = 15 • Counting on: 2+6= 6…7…8 • Commutativity: Children should understand that it does not matter which number comes first in an addition problem. 3+4 provides the same answer as 4+3 |
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Identify basic fact strategies for subtraction (double, using 0 and 1, counting on, counting back)
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• Doubles: 16-8= 8+ = 16 8+8=16 so 16-8=8
• Using 0 and 1: Once students know how to add 0 and 1, it is easy for them to subtract 0 and 1. • Counting on: 8-6= 6…7…8 • Counting back: 9-2= 9…8…7 |
