Multiples of 4
4 times even number
Rules:
a. Write half the even number and put 0 at the end.
b. Subtract the same even number from the answer at rule (a).
Examples:
4 x 2; Half of 2 is 1. Put 0 at the end to form 10. Subtract the 2 from the
10. That is 10 - 2 = 8. Hence 4 x 2 = 8.
4 x 12; Half of 13 is 6. Put 0 at the end to form 60. Subtract the 12 from the
60. That is 60 - 12 = 48. Hence 4 x 12 = 48.
4 times odd number
Rules:
a. Write half of the odd multiplier down.
b. Ignore the decimal point to get a whole number.
c. Subtract the odd multiplier from the answer at (b).
Example:
4 x 1; Half of 1 is 0.5. Ignore the decimal point to get 5. Subtract the 1
from the 5. That is 5 - 1 = 4. Hence 4 x 1 = 4.
4 x 13; Half of 1 is 6.5. Ignore the decimal point to get 65. Subtract the 13
from the 65. That is 65 - 13 = 52. Hence 4 x 13 = 52.
USE THE CALCULATOR FOR YOUR CALCULATION
CONSTRUCTED BY INNUSAH SAMUEL
