Mathematics 24x7

There is no escape...believe it or not. Mathematics is everywhere.

Recently in one of our Math assessment we had a question like this.

What is place value of 7 in  674205. Student's wrote various answers like this

a. Ten thousand

b. 70,000

c. 7 ten thousand

It became a good discussion question among all the Math teachers who teach from grade 5 to 8,

then it was decided all to marked correct. What will be your suggestion for marking correct option from the above list.

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Only b correct.

a incorrect and c though I am more sympathetic to is ambiguous.

Thank you colleen

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