A few math problems, speed to help me solve I give a reward of 50

1.(1)270°= 3 4 circumferential angle (2)120°= 2 3 flat angle (3)45°= 1 2 right angle (4)1 = 1 60 ° 5)1 = 1 60 6) 8)58°28 12 = by the way. Thank you).

2.Xiao Ming goes to school at home at 7:30 and arrives at school at 7:45. How many degrees does the minute hand on a clock travel?

3.(1) degrees, 45 minutes, 0 seconds, (2) 16°48, 36 = degrees, (3) degrees, 46 minutes, 53 seconds.

Remember to add the calculation process, thank you)

5.Xiaoli invites 9 good friends to celebrate her birthday with her, and in the process, she has to divide the round birthday cake equally among everyone to share, asking what are the corners in each cake? If the corners in each cake are 18°, how many friends did Xiaoli invite?

To explain) 360 18=20 Xiaoli invited 20-1=19

6.If the clock goes from 3:25 to 3:50, find the process of turning the hour and minute hands of the clock.

Hour hand 25* =

The minute hand is 25*6=150°

1..(1) 270° = 3 4 circumference angles.

2) 120° = 2 3 flat angles.

3) 45° = 1 2 right angles.

3..(1) Degree: 45 minutes, 0 seconds.

2) 16°48 36 = degrees.

3) Degrees 46 minutes and 53 seconds.

Xiaoli invited 20-1=19

6.Hour hand 25* =

The minute hand is 25*6=150°

x+y=100

x/y=3/2→x=3y/2

3y+2y=200→y=40，x=60

The area for growing tomatoes is (60) square meters, and the area for growing cucumbers is (40) square meters. The area where tomatoes are grown is (20) square meters more than the area where cucumbers are grown (50).

The root of the equation a = root number 3, b = 2 - root number 3

c=2, because a+b=c, the triangle does not exist.

The first equation has no solution to the problem.

Solution: x -2x + 3 (2-3) = 0

x1=√3 ； x2=2-√3

a=√3，b=2-√3

x²-4=0

x1=2 ;x2=-2

c=2 and a+b=c

Triangles with a, b, and c as sides do not exist.

1.You can't express it clearly, and you can't do it.

2. (2x+y+9)(2x+y-3)3. ＝x+2)(x-1)(x+2)(x+3)＝(x-1)(x+2)^2(x+3)

2. (1) Sort order (16+34)-(22+78)2) Calculate the sum of positive numbers 16+34=50

3) Calculate the sum of the subtracted numbers 22+78=100

4) Calculate the result 50-100=-50

When two rational numbers are added, their sum (is a rational number).

1.=2 and 3 5=2+3 5; -2 and 2 3=(-2)+2 3; So the original formula = 2 + 3 5 + (-2) + (2 3) = -1 15

2.(1) Original formula = (+16) + (34) + (22) + (78) - addition exchange rate.

2) =16) + (34)) + 22) + (78))—additive associative law.

3) =50) + (100) – addition operation.

4) =50——— symbolic operation, addition operation.

3.(1) = 1 (2) (-4 and 1 8) = (-2 and 3 4) = original = -6

3）=(1-2)+(3-4)+.99-100)=(1)+(1)+.1) [50] = -50

The available law is always equal to 1-1 x) So, the original formula = 255 256

A 2 2 2 3 2·6 8 3 13 5 39 15 40 15 1 15

2. Original = 16 22 34 78 50

1 The sum of rational numbers, whose absolute value is larger, and whose sign the result is.

2 16 + 22) = 6 The absolute value of 22 is much the same as his symbol.

3 6) +34 = 28 The absolute value of 34 is large.

4 28 + 78 = 50 The absolute value of 78 is large The result is -50 three 2 3 1

2 4 and 1 8) =

It's all clear that the key is to learn to think for yourself.

It's not difficult, the key is that it's not easy to type, and it also has to be calculated. If you want to know the answer, you can add QQ and chat with voice.

Kids, just convert decimal numbers into fractions, just count the minus sign as a minus sign, and do the math yourself to be good for yourself!!