Answer:
No, Sandra is not correct.
Step-by-step explanation:
Sandra was needed to multiply 438 by 17.
[tex]438\times17 = 438\times(10 + 7) = 438\times10 + 438\times7 = 4380 + 3066 = 7446[/tex].
17 = 10 + 7.
Sandra multiplied 438 by 1 and then multiplied 438 by 7. Sandra had taken [tex]438\times7 = 3066[/tex] 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.
