Lesson 7

Addition and Subtraction: Practice and Estimation

Est. Class Sessions: 1

Daily Practice and Problems

Teacher Notes
X

TIMS Task

217 + 217 = 434 twins

3 × 5 = 15 triplets

434 + 15 = 449 babies

V. Twins and Triplets

On an average day in America, 217 sets of twins and 5 sets of triplets are born. How many babies is this?

Show your strategy for solving the problem.