Simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 1 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 1 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 125 * 4 Simple calculation like 25 * 8 * 1 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 1 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 1 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 8 * 125 * 4 simple calculation like 25 * 4 simple calculation At least 500 This type, such as 25 * 3 * 4

1、 (23 points)
10－2.65＝ 0.9×0.08＝ 528－349＝ 6＋14.4＝ 24÷0.04＝
12.34－2.3＝ 0÷3.8＝ 0.77＋0.33＝ 7÷1.4＝ 67.5＋0.25＝7.2÷8×4＝ 5－1.4－1.6＝ 400÷125÷8＝ 1.9×4×0.5＝
80×0.125= 3× = 6 6= 2 －( + )= 10 2=
3.2×7÷3.2×7= ( － )×12= 187.7×11－187.7= 1－ 62.5%=
2、 Write down the laws or properties of each of the following questions (12 points)
4 +3.2＋5 +6.8 25×(8×0.4)×1.25 7 －(2 － )
( ) ( ) ( )
( ＋ + )×72 93.5÷3 16÷2.5
( ) ( ) ( )
3、 It is calculated by a simple method
1125－997 998+1246+9989 （8700＋870＋87）÷87
125×8.8 1.3＋4.25＋3.7＋3.75 17.15－（3.5－2.85）
3.4×99＋3.4 4.8×1.01 0.4×（2.5÷73）
（1.6＋1.6＋1.6＋1.6）×25 （＋－）÷
12.3－2.45－5.7－4.55 2 ＋ 0.125×0.25×64
64.2×87＋0.642×1300 78×36＋7.8×741－7 17＋ 8
0.125× ＋0.5 2.42 +4.58 －43
25÷100 4.25－3 －(2 －1 )
（1）1.25*17.6+36.1/0.8+2.36*12.5
1.25*17.6+36.1/0.8+2.36*12.5
=(5/4)*17.6+36.1*(5/4)+23.6*(50/4)
=176/8+361/8+236/8
=773/8=96.625
（2）7.5*2.3+1.9*2.5
7.5*2.3+1.9*2.5
=7.5*(1.9+0.4)+1.9*2.5
=(7.5+2.5)*1.9+7.5*0.4
=19+3 =22
（3）2004/2003*2005
2004/2003*2005
=(2004/2003)*(2003+2)
=2004+4008/2003
（4）276*543-267/276+543*275
276*543-267/276+543*275
=543*(276+275)-267/276
=543*551-267/276
1) 45 + 159 × 47.56 + 79 and 20 × 52.44
=52.44×79.45+159×47.56+79.55×52.44
=52.44×(79.45+79.55)+159×47.56
=52.44×159+159×47.56
=159×(52.44+47.56)
=159×100
=15900
3)2002+2001-2000-1999+1998+1997-1996-1995+…… +2+1
=(2002-2000)+(2001-1999)+(1998-1996)+(1997-1995)+…… +(6-4)+(5-3)+2+1
=2+2+2+2+…… +2 + 2 (there are 2000 numbers from 3 to 2002, so there are 1000 2) + 2 + 1
=1000×2+2+1
=2003
Both questions 4 and 5 use a conversion 1 / (a × b) = 1 / (B-A) × (1 / A-1 / b)
If 1 / 15 = 1 / (3 × 5) = 1 / (5-3) × (1 / 3-1 / 5) = 1 / 2 × (2 / 15) = 1 / 15, it can be verified
4) (1 × 1 / 2) + (2 × 1 / 3) + (3 × 1 / 4) + +(1 / 10 × 11)
=1/(1×2)+1/(2×3)+1/(3×4)+…… +1/(10×11)
=(1-1/2)+(1/2 - 1/3)+（1/3 - 1/4）+…… +（1/10 - 1/11）
=1-1/11
=10/11
5) 1 / 3 + 1 / 15 + 1 / 35 + 1 / 63 + 1 / 99
=1/(1×3)+1/(3×5)+1/(5×7)+1/(7×9)+1/(9×11)
=1/2×(1-1/3)+1/2×(1/3-1/5)+1/2×(1/5-1/7)+1/2×(1/7-1/9)+1/2×(1/9-1/11)
=1/2×(1 - 1/3 + 1/3 - 1/5 + 1/5 - 1/7 + 1/7 - 1/9 + 1/9 - 1/11)
=1/2×(1-1/11)
=1/2×10/11
=5/11
6) One and half - five sixths + seven twelfth - nine twentieth + eleven thirtieth - thirteen forty second + fifteen fifty sixth
(according to the prompt, 1 and 1 / 2 = 1 + 1 / 2, + 1 / 2 + 1 / 3 = 5 / 6 )
=(1+1/2)-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)+(1/7+1/8)
=1+ 1/2 - 1/2 - 1/3 + 1/3 + 1/4 - 1/4 - 1/5 + 1/5 + 1/6 - 1/6 - 1/7 + 1/7 + 1/8
=1+1/8
=9/8

How to calculate (1.25-0.125) x84.8

Hanying warm for you
simple form
=（1.25-0.125）×8×10.6
=（1.25×8-0.125×8）×10.6
=（10-1）×10.6
=106-10.6
=95.4
(or click "satisfied" in the upper right corner of the client)
It's my motivation to move forward! It will also bring you wealth value
If you don't understand,
Until the completion of understand this problem!

How to calculate 0.125 × 3 / 4 + 1 / 8 × 8.25 + 12.5%?

Simple calculation of 0.98 ／ 8 ／ 1.25

0.98÷8÷1.25
=0.98÷(8×1.25）
=0.98÷10
=0.098

First simplify, then evaluate: (1-x / x + 2) · (x2-4 / x2-2x + 1) / (1 / x2-1), where x2-x = 0

Primitive = - (x-1) / (x + 2) * (x + 2) (X-2) / (x-1) & # 178; * (X & # 178; - 1)
=-(x-2)/(x-1)*(x+1)(x-1)
=-(x-2)(x+1)
=-(x²-x-2)
=-(0-2)
=2

Simplification: 2012 Tianjin (x-1) 2 / X 2-2x + 1 / 1 fast

Ask the fractional equation: 480-2x600 = 45
Sorry, no 480 / x-600 / 2x = 45 (480-600 / 2) 1 / x = 45180 = 45x x = 4

Simplify x2 + 2x + 1 / X 2-y 2 △ x + 1 / X-Y

（x ² + 2 x + 1） / （x ² - y ²）÷ （x + 1）/ （x - y）
= （x + 1）² / （x + y）（x - y）× （x - y）/ （x + 1）
= （x + 1）/ （x + y）
Our team will answer for you

The reduction of x2 minus 2x divided by (x-1 minus x + 2x-1)

The original formula = [(X & # 178; - 2x) / (X & # 178; - 1)] / [(x-1) - (2x-1) / (x + 1)] = [(X & # 178; - 2x) / (X & # 178; - 1)] / [(X & # 178; - 2x) / (x-1)] = [(X & # 178; - 2x) / (X & # 178; - 1)] × [(x-1) / (X & # 178; - 2x)] = 1 / (x + 1)

One third - [2x - (x2 + 1 / 2x-3)] - (2x2 + 2) reduction
emergency

One third [2x - (x2 + 1 / 2x-3)] - (2x2 + 2)
=1/3(2x-x²-1/2x+3)-2x²-2
=-1/3x²-1/2x+1-2x²-2
=-7/3x²-1/2x-1
If you don't understand this question, you can ask,

Multiplication formula calculation (x2-2x) (x2-2x-3)

(x2-2x)(x2-2x-3)
=(x^2-2x)^2-3(x^2-2x)
=x^4-4x^3+4x^2-3x^2+6x
=x^4-4x^3+x^2+6x