Solving Addition and Subtraction Problems Using Chip Models
This guide introduces the use of a chip model to approach addition and subtraction problems. By displaying the first number on a chip board and using chips to represent the second number, students can visualize the calculation. The instructions detail adding or removing chips, incorporating zero pairs when necessary, and ultimately finding the solution through the chips remaining. This hands-on approach helps reinforce mathematical concepts and improve problem-solving skills. Suitable for educators and students in a classroom setting.
Solving Addition and Subtraction Problems Using Chip Models
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1.4 In the ChipsUsing a Chip Model To solve a problem using a chip board: • Display 1st # of number sentence onto chip board. • Add or remove chips to represent 2nd # of number sentence. (if chips need to be removed from the board but their aren’t enough there, chips must be added in the form of zero pairs) • Remove the zero pairs from chip board. • The chips remaining on the board represent the answer. Negative 1 Red Chip + 1 Black Chip = a “Zero Pair” Positive http://connectedmath.msu.edu/CD/Grade7/Chip/index.html
1.4 Practice -3 + 5 = ? 3 1 Display 1st # of number sentence onto chip board. Remove the zero pairs from chip board. 4 2 The chips remaining on the board represent the answer. Add chips to represent 2nd # of number sentence.
1.4 Practice 2 + -5 = ? 3 1 Display 1st # of number sentence onto chip board. Remove the zero pairs from chip board. 4 2 Add chips to represent 2nd # of number sentence. The chips remaining on the board represent the answer.
1.4 Practice Subtract 2 -3 - -2 = ? 3 1 Since there are no zero pairs, -1 is the answer. Display 1st # of number sentence onto chip board. 2 Subtract chips to represent 2nd # of number sentence.
1.4 Practice -2 - -3 = ? 1 2b Display 1st # of number sentence onto chip board. Then, the 3 red can be subtracted. 3 2a Remove chips to represent 2nd # of number sentence. Only 2 chips are there, so 1 zero pair must be added. Since there are no zero pairs, one is the answer.
1.4 Practice Subtract 7 4 - 7 = ? 1 2b Display 1st # of number sentence onto chip board. Then, the 7 black can be subtracted. 3 2a Remove chips to represent 2nd # of number sentence. Only 4 chips are there, so 3 zero pairs must be added. Since there are no zero pairs, negative three is the answer.
1.4 Practice 1 2b Display 1st # of number sentence onto chip board. Then, the 3 red can be subtracted. 3 2a Remove chips to represent 2nd # of number sentence. Only 2 chips are there, so 1 zero pair must be added. Since there are no zero pairs, two is the answer.
