Wednesday, September 21, 2016

Math Flash Cards: Multiply by 7 (7 is the 2nd Factor)

These math flash cards feature multiplying by 7. For many people, this set is particularly challenging because seven is a prime number and you cannot double a smaller number to get the correct answer.

Tips for Multiplying by 7
  • One way to multiply by seven is to add the other number to itself five times. For example, when multiplying 3 by 7, imagine having seven 3s or 3 + 3 + 3 + 3 + 3 + 3 + 3 = 21. Here's another example: when multiplying 6 by 7, imagine having seven 6s or 6 + 6 + 6 + 6 + 6 + 6 + 6 = 42.
  • It may be easier to skip count by 7 when multiplying by seven. Simply skip count by 7s the number of times that is equal to the number you are multiplying by five. For example, when multiplying 4 by 7, count by 7s four times...7 - 14 - 21 - 28 - 35 to get an answer of 35 or when multiplying 7 by 7, count by 7s seven times...7 - 14 - 21 - 28 - 35 - 42 - 49 for an answer of 49.
  • If you are having a hard time multiplying by 7, consider looking at the other number and multiply using the tips for multiplying the other number. For example, if you are multiplying 7 and 6, you might multiply 7 by 3 = 21 and then double it to get 42.
Directions
  1. Click on the first slide to enlarge to full screen.
  2. Click on the slide or thumbnail at the bottom to advance to the next slide.
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Math Flash Cards: Multiply by 7

Free Math Flash Cards by Katrena

0 X 7

0 X 7 = 0

1 X 7

1 X 7 = 7

2 X 7

2 X 7 = 14

3 X 7

3 X 7 = 21

4 X 7

4 X 7 = 28

5 X 7

5 X 7 = 35

6 X 7

6 X 7 = 42

7 X 7

7 X 7 = 49

8 X 7

8 X 7 = 56

9 X 7

9 X 7 = 63

10 X 7

10 X 7 = 70

11 X 7

11 X 7 = 77

12 X 7

12 X 7 = 84

Free Math Practice on Student Survive 2 Thrive

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