Grade 2 - Patterns and Relations
Standard 2.PR.3 - Simplify both sides of the equation. Fill in the missing number with sums up to 1000 to make the equation true.
Included Skills: Addition
Demonstrate understanding of equality and inequality concretely and pictorially (0 to 100) by: • relating equality and inequality to balance • comparing sets • recording equalities with an equal sign • recording inequalities with a not equal sign • solving problems involving equality and inequality. • Compare two quantities of the same object (same shape and mass) by using a balance scale to determine if the quantities are equal or not. • Construct two unequal sets using identical objects and verify orally and concretely that the sets are not equal. • Analyze the impact of changing one of two equal sets upon the equality of the two sets. • Analyze the impact of making changes (equal and unequal) to both of two equal sets upon the equality of the sets. • Analyze and sort sets according to equality and explain the reasoning. • Model two number expressions to determine if the expressions are equal (=) or not equal (≠) and write a number sentence to show the relationship (e.g., 3 + 2 and 4 + 1 are both equal to 5, so the two expressions are = and I write 3 + 2 = 4 + 1; 7 - 5 and 3 are not the same quantity, so I write 7 - 5 ≠ 3). • Create statements of equality and non-equality and model the statements to verify the relationship.