Unit 2 (Topics 7-11): Place Value

Use appropriate tools strategically. Attend to precision. Look for and make use of structure. ... Student thinks: Four 10s and one 10 are 5 tens or 50. Then 5 and 8 is 5 + 5 + 3 (or 8 + 2 + 3) or 13. ... Examples: 10 more than 43 is 53 because 53 is one more 10 than 43. ................
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