lesson
Two-Digit Subtraction With Regrouping (Mixed Practice)
Solve a mix of two-digit subtraction problems, deciding when regrouping is needed.

Solve a mix of two-digit subtraction problems, deciding when regrouping is needed.
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6 lessons
Master two-digit subtraction with and without regrouping, including across zeros, and extend addition to three or four two-digit addends.
select tools, including real objects, manipulatives, paper and pencil, and technology as appropriate, and techniques, including mental math, estimation, and number sense as appropriate, to solve problems;
communicate mathematical ideas, reasoning, and their implications using multiple representations, including symbols, diagrams, graphs, and language as appropriate;