V: Dragon.

B,

Round; circular

S region

C circumference

∏

D= diameter

R= radius

(1) circumference = diameter ×∏=2×∏× radius

c =∏d = 2r

(2) area = radius × radius×∈

nine

1

：

(1) If trees are planted at both ends of the non-closed line: the perimeter of the bottom surface.

(1) lateral area = bottom circumference × height.

(2) Surface area = lateral area+bottom area ×2

(3) Volume = bottom area × height

(4) Volume = lateral area ÷2× radius.

10

Unit price × quantity = total price

Total price/unit price = quantity

Total price ÷ quantity = unit price

five

, minuend-minuend = difference

Negative difference = negative

Difference+Minus = Minus

eight

: bottom radius

C:

Number of plants = number of segments = total length ÷ plant spacing

Total length = plant spacing × number of plants

Plant spacing = total length/number of plants

(3) If trees are not planted at both ends of the non-closed line, then; Jianping

R, cylinder

V: high

S, 1 multiple× multiple = multiple

Multiply1Multiply = Multiply

Multiply/Multiply = 1 Multiply

three

: volume

S, dividend = quotient

Dividend = divisor

Quotient × Divider = Divider

1

: high

(1) Surface area (L× W+L× H+W× H) ×2

S=2(ab+ah+bh)

(2) Volume = length × width × height

V=abh

five

, square

C circumference

S region

length of a side

Perimeter = side length ×

four

C=4a

Area = side length × side length

S=a×a

Surface area = side length × side length ×6

S table =a×a×6

Volume = side length × side length × side length

V=a×a×a

three

Then, the triangle

S region

Adidas

H height

Area = bottom × height ÷2

s=ah÷2

Height of triangle = area

× 2 base

Triangle base = area

× 2 Current height

six

: high

Student: Volume.

H, addend+addend = sum

And-one addend = another addend

seven

, cuboid

V, then, factor × factor = product

Product ÷ One factor = another factor

nine

Speed × time = distance

Distance/speed = time

Distance/time = speed

four

parallelogram

S region

Adidas

H height

Area = bottom × height

S = ah

seven

、

trapeziform

S region

A shangdi

Shadi

H height

Area = (upper bottom+lower bottom) × height ÷2

s =(a+b)× 1

h \u 2

8. Don't plant trees and rectangles at the other end.

C circumference

S region

length of a side

Circumference = (length+width) ×2

C=2(a+b)

Area = length × width

S=ab

four

; Jianping

r:

extensive

h:

Number of plants = number of nodes+1 = total length-1.

Total length = plant spacing × (number of plants-1)

Plant spacing = total length ÷ (number of plants-1)

(2) If you want to plant trees at one end of the non-closed line: bottom radius.

Volume = bottom area × height ÷3

Total number ÷ Total number of copies = average value

Formula of sum and difference problem

(sum+difference) ÷ 2 = large number

(sum and difference) ÷ 2 = decimal

And folding problems.

Sum \ (multiple-1) = decimal

Decimal × multiple = large number

(or

And-decimal = large number)

Difference problem

Difference ÷ (multiple-1) = decimal

Decimal × multiple = large number

(or

Decimal+difference = large number)

Tree planting problem

1

The problem of planting trees on non-closed lines can be divided into the following three situations: working efficiency × working time = total workload.

Total amount of work ÷ work efficiency = working hours

Total workload ÷ working time = working efficiency

six

: volume

H: area

A. Each copy × number of copies = total number

Total copies/number of copies = number of copies

Total copies/number of copies = number of copies

2