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Author Question: An open number can be used effectively for thinking about addition and subtraction. All of the ... (Read 53 times)

theo

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on: Feb 18, 2021

Question 1

All of the statements below represent the differences between invented strategies and standard algorithms EXCEPT:
◦ A range of flexible options.
◦ Left-handed rather than right-handed.
◦ Number oriented rather than digit oriented.
◦ Basis for mental computation and estimation.

Question 2

An open number can be used effectively for thinking about addition and subtraction. All of the reasons below support the use of an open number line EXCEPT:
◦ Is less flexible than a numbered line.
◦ Eliminates confusion with hash marks and spaces.
◦ Less prone to computational errors.
◦ Helps with modeling student thinking.
Elementary and Middle School Mathematics: Teaching Developmentally ¦ Van de Walle, Karp, Bay-Williams ¦ 10th Edition
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Marked as best answer by theo on Feb 18, 2021

lgoldst9

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Reply #1 on: Feb 18, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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theo

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Reply 2 on: Feb 18, 2021
YES! Correct, THANKS for helping me on my review

dantucker

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Reply 3 on: Yesterday
Wow, this really help

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