Unit 4, Lesson 11
Add Tens to 2-Digit Numbers
Grade 1
Activity 1
Find the number that makes each equation true.
Show your thinking using drawings, numbers, or words.
Show your thinking using drawings, numbers, or words.
Activity 2
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This equation is true.
What digit is under the smudge?
Show your thinking using drawings, numbers, or words. - This equation is not true.
Student Section Summary
We learned that 2-digit numbers are made up of tens and ones.
We represented 2-digit numbers in many different ways.
6 tens and 5 ones
65
We added 2-digit numbers by thinking about counting on by 10 or adding more tens.