Second Grade Common Core Math 2 NBT.7 Add And Subtract Within 1000 2.NBT.7 Practice provides two ways for students to practice adding and subtracting within 1000.
It includes 40 distinct problems in two sets (129 slides in all!), with and without following answer slides. The PowerPoint file can be used on computers, or Promethean Activboard and Smart boards.
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Standard 2.NBT.7 Use place value understanding and properties of operations to add and subtract.
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.