Description of mathematical task:
1. Students will work in groups.
2. I will give them two colored chips.
3. I will tell my students that 1 red and 1 black chip cancel each other and give us zero.
1. Students will work in groups.
2. I will give them two colored chips.
3. I will tell my students that 1 red and 1 black chip cancel each other and give us zero.
4. Then I will explain the procedure; for example,
To find the sum of +3 + (+1), students have to join three black chips (three positives) with one black chip (one positive), for a total, or sum, of four black chips (four positives, or +4). And To find the sum of -5 + (-2), students have to join five red chips (five negatives) with two red chips (two negatives), for a sum of seven red chips (seven negatives, or -7)
5. Then I will ask them to add and subtract different values using those chips.
Appropriate grade range: 1-3.
Topics that the task develop: Multiplying and dividing integers.
Material list: Colored chips.
Standard: Represent and solve problems involving addition and subtraction.
CCSS.MATH.CONTENT.1.OA.A.1
Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.1
CCSS.MATH.CONTENT.1.OA.A.2
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
Understan
To find the sum of +3 + (+1), students have to join three black chips (three positives) with one black chip (one positive), for a total, or sum, of four black chips (four positives, or +4). And To find the sum of -5 + (-2), students have to join five red chips (five negatives) with two red chips (two negatives), for a sum of seven red chips (seven negatives, or -7)
5. Then I will ask them to add and subtract different values using those chips.
Appropriate grade range: 1-3.
Topics that the task develop: Multiplying and dividing integers.
Material list: Colored chips.
Standard: Represent and solve problems involving addition and subtraction.
CCSS.MATH.CONTENT.1.OA.A.1
Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.1
CCSS.MATH.CONTENT.1.OA.A.2
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
Understan