7.AF.1 Ilearn Item Specification

Mathematical Equivalence

ON

Tags

7.AF.1

Below

Mathematical Equivalence

ON

Tags

7.AF.1

Below

• Distributive property

• Commutative property

• Associative property

• Inverse property

Tags

7.AF.1

Below

Tags

7.AF.1

Approaching

Tags

7.AF.1

Approaching

Tags

7.AF.1

Approaching

• The first mistake was in Step 3. The 3.6y should be negative and the 4.44 should be positive.

• The first mistake was in Step 3. When recording the terms, 2.64 should be the coefficient of y rather than 3.6.

• The first mistake was in Step 4. The 3.6 y should be negative.

• The first mistake was in Step 4. The student added 4.44 to 2.6 instead of subtracting 4.44 from 2.6.

Tags

7.AF.1

Approaching

Mathematical Equivalence

ON

Tags

7.AF.1

At

Mathematical Equivalence

ON

Tags

7.AF.1

At

• The student did not subtract 2 from -3x; the equivalent expression is -5x.

• The student did not subtract 2 from -3; the equivalent expression is -3x-5.

• The student did not find the product of -3 and -2; the equivalent expression is -3x+6.

• The student did not keep the parenthesis around -2; the equivalent expression is -3x(-2).

Tags

7.AF.1

At