Learn 4 x 5 = 20
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Cookie Math |
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4 cookies, each
having 5 chocolate chips, equal 20 chocolate chips
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5 + 5 + 5 + 5 =
20
(Repeated Addition)
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4 x 5 = 20
(Algorithm)
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Base Pictures |
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The
picture used to help you remember 4 x 5 will contain a door (4) and a
hive (5).
The picture also contains a hive that is
denty (20) to
help you remember the answer.
4
(Door) x 5
(Hive) = 20
(Denty) |
4 = DOOR |
5 = HIVE |
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Other Tips on Remembering 4 x 5 = 20 |
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Double-Double
- Double-double the number you are multiplying four by. (Double
it twice)
- 4 x 5 (Double 5 Twice)
- 5 doubled once is 10, 10 doubled is 20
- Another way to figure the answer is double the answer you would
get if you multiplied the number by 2.
Skip Counting (by 5's)
- Skip counting is counting while skipping one or more numbers.
To skip count by 5's, skip 4 numbers while counting.
(5...10...15...20...) Many refer to this a "counting by 5's
- 4 x 5 is skip counting four times or 5...10...15...20 and you are at the answer
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Practice |
To help
remember 4 x 5 = 20, do the following.
- Watch the video and listen to the
story 3 or 4 times.
- Close your eyes and see the
picture.
- Draw the picture you see for 4 x
5 = 20. (From memory)
- Write the story for 4 x 5 = 20 in
your own words.
- Practice with flashcards.
(Click here
to download flashcards)
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| Play an interactive games. (Select level
4)
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