2.NBT.7
Demonstrate understanding of place value within 1000 when adding and subtracting three-digit numbers. Use concrete models or drawings and strategies based on place value, properties of operation, and/or the relationship between addition and subtraction to add and subtract within 1000. Use a written method to explain the strategy.
Khan Academy ResourcesIdentify the value of a digit (ones, tens, hundreds)Subtract 10s and 100s (no regrouping)Place value blocks within 1,000Regroup whole numbersAdd on a number lineAdd within 1,000 using place value blocksSelect strategies for adding within 100Break apart 3-digit addition problemsHundreds, tens, and onesAdd 10s and 100s (no regrouping)Place value tables within 1,000Regrouping whole numbers: 675Breaking apart 3-digit addition problemsAdding 10 or 100Adding 1s, 10s, and 100sAdding and subtracting on number lineUse place value blocks to show numbers within 1,000Place value tables within 1,000Identifying value in digitsIntro to place valueSubtracting 1, 10, or 100

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