Ask for help Help for a primary school math problem

Cut the rectangle into nine equal squares, and you'll find that the dots h and p are ...... exactly at the intersection of the long and wide trine

So: S triangle pdf = 1 2 (3) * (3) = s triangle ahp = 1 2 (4) * (6) = 12s triangle bhe = 1 2 (2) * (

So shaded part area =

S triangle pdf = 3 3 2 = cmm

S triangle AHP = 4 6 2 = 12 CMM

S-triangle BHE = 2 cmm

So shaded part area = cmm

1. See who's right.

2. Fill in the blanks. 1 Look at the number of pictures and write.

2 The two numbers adjacent to 59 are ( ) and ( ).

3 A number is 3 in the single digit and 5 in the tenth digit, and this number is ( ).

4 Please continue to write , (

5 The subtracted number is 89, the subtraction is 9, and the difference is ( ).

6 50 is 1 bigger than ( ) and 1 smaller than ( ).

7 One plus is 6, the other plus is 90, and is ( ).

8 digits are 8 digits, and there are ( ) digits.

9 Fill in the blanks according to the Hundreds Table.

10 Mom is older than 35 and younger than 41, and she is an even number. Mom may be ( ) years old, ( years old or ( ) years old.

3. Fill in " " or "=".

4. Multiple choice questions (draw "" in the "" after the correct answer.)

1 is a little less than 48. 46□ 18□ 98□

2 The number of students in Class Two (1) is more than 30 and less than 40, and the number of students in the single position is 7. How many people are in Class Two (1)?

3 How many baskets are there on the right? 30□ 20□ 50□

4 What is the number in the equation 13-7?

Numbers greater than 6 Numbers smaller than 6 6

5 =12, =10, so what is it?

5. Fill in the form. The original 45 branches, 18 ( ) vehicles, 30 pieces, 5 branches, 40 vehicles, and 9 branches, 8 vehicles, 10 pieces.

6. Draw a square and a parallelogram on the graph paper below.

Seventh, solve practical problems.

1.We received 40 bags in our class.

There are 20 bags left.

How many bags of milk were there?

2 A children's illustrated magazine, 48 pages.

I still have 8 pages to read, how many pages has Xiao Ning read?

3.Obviously, I brought a total of 70 yuan to the street to buy things, and after using some of them, I still had 30 yuan left. How much does it cost?

4 20 apples and 30 pears.

1) How many apples and pears are sold?

2) How many pears are left?

From the polynomial that p i(x) is a polynomial with a degree greater than 0, it can be seen that the order of p i(x) is smaller than the order of p(x), and the polynomial with a high order is of course not divisible by the polynomial with a low order, where i = 1, 2.

19(1)sin = 1-cos so sina = 9 17 so tan = eighths long.

2) The original formula is the same as the same as the cos, and the original formula is launched = five-quarters.

20？What is the meaning.

Because y=x-m is parallel to y=x

According to the observation of the question design, it can be seen that the point in pq is y=-x+1

by y=x-m

y=-x+1

x=(1+m) 2

y=(1-m)/2

If you want to r, rp rq on the x-axis, you need to use this midpoint as the center of the circle, and the circle of the radius of pq 2 has an intersection point with the x-axis.

x-(1+m) 2) 2+(y-(1-m) 2) 2=1 2pq joint solution y=x-m

x-1)^2+y^2=9

x1=(1+m) 2+root[18-(m-1) 2] 2x2=(1+m) 2-root[18-(m-1) 2] 2y1=(1-m) 2+root[18-(m-1) 2] 2y2=(1-m) 2-root[18-(m-1) 2] 2(x1-x2) 2+(y1-y2) 2=pq 2 to obtain pq substitution.

x-(1+m) 2) 2+(y-(1-m) 2) 2=1 2pq makes y=0

Find b 2-4ac>=0, dizziness, I'm thinking this way.

You only need to satisfy that there are two intersections between the line and the circle!

x^2-2x+1+x^2-2mx+m^2-9=02x^2-2(m+1)x+m^2-9=0

4(m+1)^2-8(m^2-9)>0

1-2 root number 6

Bottom radius: m.

Volume: cubic meters.