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Student Instructions
You can count up to find the difference between two large numbers.
1. Follow the steps demonstrated in the first slide.
2. Solve each problem.
3. Click 
to turn it in.
Teacher Notes (not visible to students)
Standard 2NBT.B.7 Add and subtract within 1000, 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. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.
