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Yakvenalex [24]
3 years ago
9

How to work out 280 times 380

Mathematics
2 answers:
garik1379 [7]3 years ago
5 0
Here is another way
1st- put the #'s on top of each other
280
380
2nd- since both of them have 0's when done just add two 0
3- take out zeros HAVE TO BE AT END OF #
4- now ur problem is 28 • 38
5- put #'s on top of each other
28
38
6- multiply 8 by 8 and then 2 by 8
28
38
____
4 take 6 to the top of 2
6
28
38
_____
224 2 times 8=16 add 6 to 16= 16+6= 22
Then put a 0 under the 4 because we are not adding anything to that 4

Then do
28
38
28•3
You get 84
28
38
_____
224
84*put 84 in remaing places
Add those two togethed
224+84= 308
Then add two zeros
30800
Add a comma
30,800 is ur finale answer


jok3333 [9.3K]3 years ago
4 0
                      2  8  0
              <u>    x  </u><u>3  8  0 
</u>                      0  0  0
              2  2  4  0
<u>         +   8  4  0           </u> 
          1  0  6  4   0   0       

So, 280 x 380 = 106400
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