We can name numbers with words, digits, and place values.

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• We can name numbers with words, digits, and place
  values.
• Compare number by looking at the largest place
  value first and then smaller place values until
  you find a place with different digits to compare.

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• When we add or subtract groups of 100, the ones
  and tens places are zeroes. So, we only have to
  add or subtract the hundreds to find the answer.

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• When adding groups of 100 to a 2- or 3-digit
  number, the number of ones and tens stays the
  same and the number of hundreds changes.
• When subtracting groups of 100 from 3-digit
  numbers, the number ones and tens stays the same
  and the number of hundreds changes.
• To add or subtract a group of 100 to or from a
  number, add or subtract the hundreds.

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• To add 3-digit numbers, add the ones, add the
  tens, add the hundreds, and then find the total
  of the ones, tens, and hundreds.

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• If there are more than 9 ones in the ones place,
  regroup from the ones to the tens place.
• If there are more than 9 tens in the tens place,
  regroup from the tens to the hundreds place.
• To add 3-digit numbers add the ones, add the
  tens, add the hundreds, and then find the total
  of the ones, tens, and hundreds.

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• To add numbers, add each place and find the total
  of all of the places.
• If there are more than 9 hundreds in the hundreds
  place, regroup 10 hundreds as 1 thousand in the
  thousands place.

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• When subtracting, look at each place to see if
  there are enough to subtract and regroup if
  needed.
• To subtract 3-digit numbers, subtract the digits
  in the ones place first, then the digits in the
  tens place, and finally the digits in the
  hundreds place.

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• When you record a subtraction problem, each
  number in the problem describes what you did with
  the cubes. The numbers describe how many cubes
  there were to start, how many were taken away,
  and how many were left.

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• After you regroup a number, you can describe it
  with a nickname. The nickname is another
  name for the same number.
• When subtracting, we look at each place to see if
  we have enough to subtract and regroup if we need
  to. Next, we subtract the number in the ones
  place first, then the number in the tens place
  next, then the number in the hundreds place, and
  so on.

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• After you regroup a number, you can describe it
  with a nickname. The nickname is another name
  for the same number.
• When subtracting, we look at each place to see if
  we have enough to subtract, regroup, and give a
  nickname if we need to. Next, we subtract the
  number in the ones place first, then the number
  in the tens place, then the number in the
  hundreds place, and so on.

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• We can compare 2 numbers by subtracting the
  smaller number from the larger number.
• To find the total of 2 numbers, add.
• When you have a certain number and take some
  away, you can subtract to find out how much is
  left.

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• When you have a certain number but need more to
  reach your goal, you can subtract what you have
  from your goal to find out how much more you
  need.
• To solve story problems, first decide whether to
  add or subtract. Then, solve the addition or
  subtraction problem to find the answer.

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