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Mathematics, 24.01.2020 03:31 jennifercastillo1233

sandra used partial products to find the product of 438 x 17 by multiplying 438 by 1 and 438 by 7 to get 3,066.is sandra correct? compare your answer to sandra's and explain why it is or is not the same.

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Answer from: levigabehart
No, Sandra is not correct.

Step-by-step explanation:

Sandra was needed to multiply 438 by 17.

438\times17 = 438\times(10 + 7) = 438\times10 + 438\times7 = 4380 + 3066 = 7446.

17 = 10 + 7.

Sandra multiplied 438 by 1 and then multiplied 438 by 7. Sandra had taken 438\times7 = 3066 as the answer.

Multiplying by 1 and multiplying by 10 is not same.

Sandra mistakenly multiplied 438 by 1 instead of 10.

Hence, Sandra got the wrong answer.

ansver
Answer from: Quest
Yes you are correct
What is x and y when the angles are 90,60 and 30 and the right angle side is 8?
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Answer from: Quest
The academic affairs council is the highest expert body processing academic affairs, as stipulated by the university statutes. specialist aaro häkkinen (educational policy) took part in the council’s meeting. the agenda of the meeting included bachelors’ feedback, the timing of pedagogical studies, the grant system for tuition fees, the standardisation of administrative practices for internships and the situation of foreign-language and multilingual master’s programmes.

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