2.N.3.b
Understand 100 as a bundle, collection, or (more abstractly) composition of ten tens and that the three digits of a three-digit number represent a composition of some hundreds, some tens, and some ones.
Khan Academy ResourcesSubtract within 1,000 using place value blocksIdentify the value of a digit (ones, tens, hundreds)Subtract 10s and 100s (no regrouping)Place value blocks within 1,000Regroup whole numbersAdd within 1,000 using place value blocksWrite numbers in number and expanded formHundreds, tens, and onesAdd 10s and 100s (no regrouping)Place value tables within 1,000Word form and expanded formExpanded form of numbersSubtracting 3-digit numbers (no regrouping)Adding 10 or 100Adding 1s, 10s, and 100sUse place value blocks to show numbers within 1,000Place value tables within 1,000Creating the largest numberIdentifying value in digitsSubtracting 1s, 10s, and 100sSubtracting 1, 10, or 100Subtracting with place value blocks (regrouping)

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