3:4=(12)/16=21÷(28)=6+( )/8+64=75%

3:4=(12)/16=21÷(28)=6+( )/8+64=75%

3:4=(12)/16=21÷(28)=6+(48 )/8+64=75%
6+（）=72*75%=54
（）=54-6=48
Potato group Shao Wenchao answers questions for you
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1: 28 7:32 2:32 8:12 3:57 4:21 5:38 4:05 6:48 9:41 10:30 11:29 12:30 speak in English

One twenty eight three five seven look at this. It is often necessary to express time when speaking or reading English aloud. How to express time accurately in English? Generally speaking, there are two ways to express time

There are 60 students in class 6 (1), 1 / 12 more than Class 6 (2). The number of students in class 6 (1) is equivalent to ()
A.11/11 B.12/11 C.11/12
Isn't the answer 13 / 12? How to explain 12 / 11?

60 is useless in this question
If class (2) is 12, then
(1) Class is 13,
Class six (1) is equivalent to 13 / 12 of class six (2)

48×（﹣1/6 ＋ 3/4 - 1/12）=?

The correct answer is 24

How to calculate the area of trapezoid

There are two algorithms for trapezoidal area
(1) The area formula of trapezoid: (upper bottom + lower bottom) × height △ 2
It is indicated by letters: (a + b) × h △ 2
(2) Area formula of trapezoid 2: median line × height
Denoted by letter: l · H (L denotes median line length)
In addition, the trapezoid with diagonal perpendicular to each other: diagonal × diagonal △ 2

How to use formula to calculate trapezoidal area
Is there more, more than one

Area: (upper bottom + lower bottom) * height / 2
Expressed in letters: S = (a + b) H / 2
Height: Area / 2 * (upper bottom + lower bottom)
In letters: H = 2S * (a + b)
Finding the sum of upper and lower bottom: area * 2 / height
Expressed in letters: a + B = 2S / h
Upper bottom: area * 2 / height - lower bottom
Expressed in letters: a = 2S / H-B
Bottom: area * 2 / height - Top
B = 2S / H-A

How to calculate the area formula of trapezoid

From the top to the bottom, make the vertical lines of the two end points. There is a rectangle in the middle and two triangles on both sides,

What is the area formula of trapezoid?

{(upper bottom + lower bottom) × height} 2

Mathematical calculation.. 21 28 16 10 31 29 how to calculate equal to 18?

28-{31+29-(21-16)x10}=18
There are other algorithms, slightly change the position on the line

=6 = 9 = 12 = 15 = 18 = 21... How to calculate?

=3+3n