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Learning About Number Bonds

Learning About Number Bonds

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Author: Yessenia Iniguez
Description:

Apply properties of operations as strategies to add and subtract.2 Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)

CCSS.Math.Content.1.OA.C.6

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

CCSS.Math.Content.1.OA.D.7
Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 - 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.

Grade: First

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Tutorial

  • What are number bonds? A number bond is a mental picture of the relationship between a number and the parts that combine to make it.

  • How can I use a number bond? A number bond help you to see how different numbers can be combined to make a bigger number. The bigger number represents the WHOLE and the other small number represent its PARTS.  If you know the parts (different number combinations), you can put them together (add) to find the whole. If you know the whole and one of the parts, you take away the part you know (subtract) to find the other part. In other words number bonds help you to add and subtract.

  • Example of a number bonds:

    • Number Bonds are very helpful because a young student who does not understand math notation can clearly see the connection between these numbers.

      • for example:

        • 4 + 2 = 6
          2 + 4 = 6
          6 – 4 = 2
          6 – 2 = 4

  •  To being learning about number bonds in detail please watch the following video:

  • To go explore the math concept:

  • It is time to practice!!

    • First, the teacher will how the following website in which students can practice

      • http://www.math-salamanders.com/number-bonds.html#zoneArea1

        • The teacher will provide instructions for groups to set the website first as a guided practice without setting the time to explain and reinforce the concept.

        • Then, when student feel ready, they will set the timer to practice independently.

Source: Number Bonds Practice Zone. (n.d.). Retrieved May 5, 2015, from http://www.math-salamanders.com/number-bonds.html#zoneArea1Secret Agent Number Bond. (n.d.). Retrieved May 5, 2015, from https://www.youtube.com/watch?v=cwYu2er_XsU