On the counter, use five counting beads to pull out a three digit number. What is the largest three digit number and the smallest one

On the counter, use five counting beads to pull out a three digit number. What is the largest three digit number and the smallest one

Among the three digits represented by 5 beads on the counter, the largest three digits is 500 and the smallest three digits is 104

How to calculate? You don't need a calculator·
And what is the monotone interval of the function y = x ^ 2 on (- 2,1)

7!=7x6x5x4x3x2x1=2x4x5x6x3x7=240x21=4800+240=5040
-2

What are the main characteristics of the electronic mathematics computer
A (high speed)
B (high precision)
C (stored program and automatic control)
D (good memory)

Choose B

Put the ten numbers 0,1,2,3,4,5,6,7,8,9 into the square to make the equation hold. Each number can only be used once. O + o = O, O-O = O, O * o = oo

3+6=9
8-7=1
4*5=20

How to solve the equation (7-1.4) x = 5.6

x=5.6/(7-1.4)=5.6/5.6=1

7 (6.5 + x) = 87.5

7(6.5+x)=87.5
6.5+x=87.5÷7
6.5+x=12.5
x=12.5-6.5
x=6

Solution equation: 7 / x ^ 2 + X-2 / x-x ^ 3 = 6 / x ^ 2-1

7/x^2+x-2/x-x^3=6/x^2-1
7/x^2 + (x-2)/x(1-x^2)=6/(x^2-1)
7/x^2 - (x-2)/x(x^2-1)=6/(x^2-1)
7(x^2-1) - x(x-2)=6x^2
7x^2-7 - x^2+2x=6x^2
x=7/2
It is proved that x = 7 / 2 is the solution of the equation

95-60% x = 35 solved by equation

95-60%x=35
0.6x=95-35
0.6x=60
x=60÷0.6
x=100

How to solve the equation of X + 3.5 = 79.4?

X+3.5=79.4
X=79.4-3.5
X=75.9
Do not understand can ask, help please adopt, thank you!

Solution equation: x + 50% x = 4.5

x+50%x=4.5
x+0.5x=4.5
1.5x=4.5
x=4.5÷0.5
x=3