In this lesson, students look for and make use of structure on the addition chart by looking for and coloring problems with the same total.
In this lesson, students model 0 less and 1 less pictorially and as subtraction number sentences.
In this lesson, students model n-n and n-(n-1) pictorially and as subtraction sentences.
In this lesson, students relate subtraction facts involving fives and doubles to corresponding decompositions.
In this lesson, students relate subtractions from ten to corresponding decompositions.
In this lesson, students relate subtractions from nine to corresponding decompositions.
In this lesson, students look for and make use of repeated reasoning and structure using the addition chart to solve subtraction problems.
In this lesson, students analyze the addition chart to create sets of related addition and subtraction facts.
In this lesson, students solve problems with addends of 7, 8, and 9.
In this lesson, students share and critique peer solution strategies for put together with total unknown word problems.
In this lesson, students use the associative and commutative properties to make ten with three addends.
In this lesson, students make ten when one addend is 9.
In this lesson, students compare efficiency of counting on and making ten when one addend is 9.
In this lesson, students make ten when one addend is 8.
In this lesson, students make ten when one addend is 8.
In this lesson, students compare efficiency of counting on and making ten when one addend is 8.
In this lesson, students solve word problems with subtraction of 9 from 10.
In this lesson, students solve word problems with subtraction of 9 from 10.
In this lesson, students model subtraction of 9 from teen numbers.
In this lesson, students model subtraction of 9 from teen numbers.