Skip to main content

SQUARING DOUBLE DIGIT NUMBERS WITHOUT CALCULATOR

SQUARING DOUBLE DIGIT  NUMBERS WITHOUT CALCULATOR
To find the square of a given two digit number "ab",reduce the two digit number by the unit number(ab-b),then add the unit number to the number to  get (ab+b).
Multiply (ab-b)x(ab+b) + b 2(squared).
Number
Square
Calculations
12
144
(12-2)x(12+2) + 22 =10 x 14 + 22= 140+4=144
14
196
(14-4)x(14+4) + 42 =10 x 18 + 42= 180+16=196
46
2136
(46-6)x(46+6) + 62 =40 x 52 + 62= 2100+36=2136
73
5349
(73-3)x(73+3) + 32 =70 x 76 + 32= 5320+9=5349

Comments

Post a Comment

Popular posts from this blog

SCIENCE FOR DEVELOPMENT IN AFRICA

The foundation of Technological advancement in Science and Maths. This means that a society with hope of making a stand in this area must take it very serious.That's is the fastest way to generate plenty of  experts like Doctors, Engineers etc in order to serve it's interest is bound to achieve a high level of development. Education is the greatest legacy  for any generation to acquire. Quality education for Africa is education that works for Africa, by embracing a scheme that will provide it competitive advantage which other nations such as China, India, Singapore, etc are using to dominate the globe.It is education that is geared towards improving the quality of life of Africa for Africa.Education is the shortest bridge that guarantee this future.  In sub- Sahara Africa there is growing concern about the quality of life and continual risk of it's depreciation. These issues are evident constant rise of poverty, hunger, diseases, conflicts. Africa needs to arms it's p...
Post a Comment
Read more