©abcteach                      Multiply by 2          math

Multiplying by 2 is easy.  You can double the number.  If you can do this in your head great!  If not, you can find the answer by adding the number twice.  

For example: 13 x 2 =  13 + 13 = 26  or  120 x 2 = 120 + 120 = 240

Fill in the following blanks:

12 x 2 = _______ + ________ = __________

30 x 2 = _______ + ________= __________

100 x2 = _______ + ________= __________

Now do the following problems: (show your work)

24 x 2 =

54 x 2 =

32 x 2 =

200 x 2 =

400 x 2 =

Challenge!

175 x 2 =

1000 x 2 =

1210 x 2 =