Difference between revisions of "1998 CEMC Gauss (Grade 7) Problems/Problem 6"

(Created page with "== Problem == In the multiplication question, the sum of the digits in the four boxes is: [Multiply <math>879 \times 492</math> using long multiplication. Find the sum of the...")
 
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-edited by coolmath34
 
-edited by coolmath34
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If anyone knows the LaTeX to show long multiplication, any help would be appreciated.
 
If anyone knows the LaTeX to show long multiplication, any help would be appreciated.

Revision as of 13:02, 29 January 2021

Problem

In the multiplication question, the sum of the digits in the four boxes is:

[Multiply $879 \times 492$ using long multiplication. Find the sum of the four numbers in the thousands place column.]

$\text{(A)}\ 13 \qquad \text{(B)}\ 12 \qquad \text{(C)}\ 27 \qquad \text{(D)}\ 9 \qquad \text{(E)}\ 22$

Solution

Multiplying, we find that the numbers in the thousands place column are 1, 9, 1, and 2 respectively. Adding yields a sum of 12, so the answer is $\text{(B)}.$

-edited by coolmath34

If anyone knows the LaTeX to show long multiplication, any help would be appreciated.