The page for multiplication tricks!
|The 25ís trick|
|Get a number||12|
|multiply it by 100||1200|
|Divide that number by 4.||300|
|That's your answer for 12 x 25.|
|Now let's say the number is 43||43|
|Times it by 100.||4300|
|Divide it by four.||100|
|You have a remainder of 3. Multiply it by 25 and write it down.||10075|
|That's the answer to 43 x 25.||
|The 50ís trick||It is the same as the 25ís trick except for you divide by 2, and you multiply the remainder by 50.|
The 101ís trick.
To multiply any 2-digit number by 101, just write it down twice. 34 x 101= 3434 However, if it is a 1-digit number, put a zero in between. 2 x 101= 202
Foil is far by the most important, if you canít remember the 25, 50, or another trick, remember this one!!! F O + I L I U N A R T N S S E E T T R R Really, you should do LIOF. 12 x 13 Last numbers, 2 & 3. 2 x 3= 6 6 Inner, 2 & 1 2 x 1= 2 (remember 2) Outer, 1 &3 1 x 3= 3 (remember 3) + , add the inner answer and the outer. 2+3=5 56 First, 1 x 1= 1 156 Thats your answer, 156!!
To multiply any number by 11, first, get a number!! 765 Second of all, write the last digit. 5 Add the last digit to the one on itís left. 5+6=11 15 (remember 1) Add the next number to itís next. ( Add a number that you remembered if you have to.) 415 Repeat the last step till needed to. Write down the first digit. ( Add a number you remembered if you have to.) 8415 You got it! 8415 is the answer!!!
Good Luck trying these on your own!!!!