How to calculate (59 + 21) * 96 / 8

How to calculate (59 + 21) * 96 / 8

（59+21）*96/8
=（59+21）*（96/8）
=（59+21）*12
=80*12
=960

1997 * 1999-1996 * 2000 how to calculate simply

1997*1999-1996*2000
=
1997*（2000-1）-1996*2000
=1997×2000-1997-1996*2000
=1997×2000-1996*2000-1997
=（1997-1996）×2000-1997
=2000-1997
=3

Calculate the square of 2012 - 144

2012²-144=（2000+12）²-144=2000²+2×12×2000+12²-144=4000000+48000=4048000

Use the formula to calculate: how much is the square of 2012

2012²
=（2000+12）²
=2000²+2*2000*12+12²
=4000000+48000+144
=4048144

11 / 20 ha = () m2

11 / 20 ha = (5500) m2
11／20×10000=5500

Square of 11 + square of 12 + square of 13. + square of 20=

Square of 11 + square of 12 + square of 13. + square of 20 = 2485

The square of 11 to 20

121
one hundred and forty-four
one hundred and sixty-nine
one hundred and ninety-six
two hundred and twenty-five
two hundred and fifty-six
two hundred and eighty-nine
three hundred and twenty-four
three hundred and sixty-one
four hundred

Ask 1-20 square, lazy to calculate, everyone help

1*1=1 2*2=43*3=94*4=165*5=256*6=367*7=498*8=649*9=8110*10=10011*11=12112*12=14413*13=16914*14=19615*15=22516*16=25617*17=28918*18=32419*19=36120*20=400

The square of one number plus the square of another
X square + y square =?
What about the square of X - the square of Y?

(x+y)^2=x^2+2xy+y^2
(x-y)^2=x^2-2xy+y^2
x^2+y^2=(x+y)^2-2xy=(x-y)^2+2xy=[(x+y)^2+(x-y)^2]/2
x^2-y^2=(x+y)(x-y)

How to square a number?
For example, how to estimate √ 2 and between which two numbers is √ 41?

If √ 2 is 1.414, the square of 1 and the square of 2 should be considered when estimating. If 1 is greater than (√ 2's Square) and less than 4, then √ 2 is between 1 and 2;
When estimating √ 41, look at the square of 6 and the square of 7. 36 is greater than (√ 41) and less than 49, so √ 41 is between 6 and 7
When estimating, we should see that the square of the natural number is less than √ a,