Space Race | Adding Tens and Ones

Space Race - Adding tens and ones and starting with a round two-digit number builds an important foundation for number sense. Pick the correct answer to each question to help your character win the race through space.

Common Core Standards

Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

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