Recognize the relationship between counting and addition and subtraction. Skip count by 2s, 5s, and 10s.
Number & Operation
Use a variety of models and strategies to solve addition and subtraction problems in real-world and mathematical contexts.
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Find 10 more or 10 less than a given three-digit number. Find 100 more or 100 less than a given three-digit number.
Add and subtract multi-digit numbers, using efficient and generalizable procedures based on knowledge of place value, including standard algorithms.
Count, with and without objects, forward and backward to at least 20.
Find 10,000 more or 10,000 less than a given five-digit number. Find 1000 more or 1000 less than a given four- or five-digit. Find 100 more or 100 less than a given four- or five-digit number.
Estimate sums and differences up to 100.