In this section, you will learn the shortcuts which will be useful to do times table easily.
To understand the shortcuts, you have to remember the following multiplication.
Single digit number x Single digit number
Example :
2 x 8 = 16
5 x 7 = 35
8 x 6 = 48
And it is difficult for us to remember answer for
two digit number x single digit number
and
two digit number x two digit number
Here, we have given shortcuts to find answer for the above multiplications which come in times table.
This method is explained for 1 at the ten's place of two digit number (Times Table).
Steps to be followed to understand the above shortcut :
Step 1 :
First take the single digit number and multiply it by 10.
(7 x 10 = 70 in the above example)
Step 2 :
Multiply the single digit and unit digit of the two digit number.
(7 x 2 = 14 in the above example)
Step 3 :
Add step 1 value and step 2 value.
(70 + 14 = 84 in the above example)
Try yourself :
12 x 9 = ?
16 x 5 = ?
7 x 19 = ?
In this way you can try a lot.
This method is explained for 1 at the ten's place of both the two digit numbers (Times Table).
Method 1 :
Method 2 :
Steps to be followed to understand both the methods :
Step 1 :
Add one of the two digit number and the digit in one's place in the other number. Multiply the result by 10.
(17 + 2 = 19 ----> 19 x 10 = 190)
or
(12 + 7 = 19 ----> 19 x 10 = 190)
Step 2 :
Multiply the digits in one's place of both the numbers.
Step 3 :
Add the results of step 1 and 2, you will get answer.
Try yourself :
12 x 16 = ?
15 x 13 = ?
18 x 19 = ?
In this way, you can try a lot.
To use these shortcuts, you must have much practice on these. Otherwise, the shortcuts explained above will not work properly and you may not be able to get correct answer. So, please do much practice on these shortcuts using different numbers.
Note :
The shortcuts explained above will work only for 1 at the ten's place of two digit numbers and not for any number.
Problem 1 :
Evaluate : 297 x 5
Solution :
297 x 5 = (300 - 3) x 5
297 x 5 = 1500 - 15
297 x 5 = 1485
Problem 2 :
Evaluate : 30 x 25
Solution :
30 x 25 = 30 x (20 + 5)
30 x 25 = 600 + 150
30 x 25 = 750
Problem 3 :
Evaluate : 1250 x 6
Solution :
1250 x 6 = (1000 + 250) x 6
1250 x 6 = 6000 + 1500
1250 x 6 = 7500
Problem 4 :
Evaluate : 1500 x 12
Solution :
1500 x 12 = 1500 x (10 + 2)
1500 x 12 = 15000 + 3000
1500 x 12 = 18000
Problem 5 :
Evaluate : 500 x 16
Solution :
500 x 16 = 500 x (10 + 6)
500 x 16 = 5000 + 3000
500 x 16 = 8000
Kindly mail your feedback to v4formath@gmail.com
We always appreciate your feedback.
WORD PROBLEMS
Word problems on simple equations
Word problems on linear equations
Word problems on quadratic equations
Area and perimeter word problems
Word problems on direct variation and inverse variation
Word problems on comparing rates
Converting customary units word problems
Converting metric units word problems
Word problems on simple interest
Word problems on compound interest
Word problems on types of angles
Complementary and supplementary angles word problems
Markup and markdown word problems
Word problems on mixed fractions
One step equation word problems
Linear inequalities word problems
Ratio and proportion word problems
Word problems on sets and Venn diagrams
Pythagorean theorem word problems
Percent of a number word problems
Word problems on constant speed
Word problems on average speed
Word problems on sum of the angles of a triangle is 180 degree
OTHER TOPICS
Time, speed and distance shortcuts
Ratio and proportion shortcuts
Domain and range of rational functions
Domain and range of rational functions with holes
Graphing rational functions with holes
Converting repeating decimals in to fractions
Decimal representation of rational numbers
Finding square root using long division
L.C.M method to solve time and work problems
Translating the word problems in to algebraic expressions
Remainder when 2 power 256 is divided by 17
Remainder when 17 power 23 is divided by 16
Sum of all three digit numbers divisible by 6
Sum of all three digit numbers divisible by 7
Sum of all three digit numbers divisible by 8
Sum of all three digit numbers formed using 1, 3, 4
Sum of all three four digit numbers formed with non zero digits
Sum of all three four digit numbers formed using 0, 1, 2, 3
Sum of all three four digit numbers formed using 1, 2, 5, 6
©All rights reserved. onlinemath4all.com
May 22, 22 03:05 AM
Linear Growth and Decay
May 22, 22 01:15 AM
Worksheet on Probability
May 22, 22 01:12 AM
Probability Worksheet