Xiao Hong read a story book. On the first day, she read 45 pages. On the second day, she read 25 pages of the whole book. On the second day, she read 20% more pages than on the first day. How many pages are there in this book?

Xiao Hong read a story book. On the first day, she read 45 pages. On the second day, she read 25 pages of the whole book. On the second day, she read 20% more pages than on the first day. How many pages are there in this book?

45 × (1 + 20%) / 25 = 45 × 1.2 ／ 25 = 54 × 52 = 135 (pages) a: there are 135 pages in this book

Xiao gang saw a story book. He read 56 pages a day. After four days, there were 311 pages left. How many pages are there in this book? How many pages are left to read?

(56 × 4) △ 1-311, = 224 △ 811, = 308 (pages); 308 × 311 = 84 (pages); a: there are 308 pages in this book, and there are 84 pages left

Xiao Gang read 56 pages of a story book every day and 11 / 8 of the whole book in three days. How many pages are there in the book and how many pages are left

56*3=8/11x
x=231
Please accept
What's left
231*3/11=63

Xiao Gang read 56 pages of a story book tomorrow and eight out of eleven pages of the whole book in three days. How many pages are there in this book? How many pages are left to read

Suppose the book has x pages
X × 8 / 11 = 56 × 3
8x out of 11 = 168
X = 168 △ 8 / 11
X=231
231-56 × 3 = 63 pages left

(5.32 + 3.48) * 1.25 simple calculation

(5.32+3.48)*1.25
=8.8x1.25
=(8+0.8)x1.25
=8x1.25+0.8x1.25
=10+1
=11

The height of a trapezoid is 5 meters. If the upper and lower bottoms are unchanged, the area will be increased by 8 square meters after the height is increased by 2 meters. The original trapezoid area is () square meters

The height of a trapezoid is 5 meters. If the upper and lower bottoms are unchanged, the area will be increased by 8 square meters after the height is increased by 2 meters. The original trapezoid area is (20) square meters
Upper bottom + lower bottom = 8 × 2 △ 2 = 8 (m)
Area of original trapezoid = 8 × 5 △ 2 = 20 (M2)

X-20% x = 12 (solving equation)

A triangle and a parallelogram have the same base and height. If the area of the parallelogram is 128 square meters, then the area of the triangle is 128 square meters______ ．

A: the area of triangle is 64 square meters, so the answer is 64 square meters

What is the sum of the first 99 consecutive integers in the series of - 49, - 48, - 47..., 2013? The first 100
In the series of - 49, - 48, - 47..., 2013
What is the sum of the first 99 consecutive integers?
What is the sum of the first 100 consecutive integers?

0
fifty

As shown in the figure, in the equilateral triangle ABC, D and E are the points on the sides of AB and BC respectively, ad = be, AE intersects CD at point F, Ag ⊥ CD at point G, if Ag = 2, then the value of AF is ()
A. 52B. 32C. 34D. 433

In △ ace and △ CBD, AC = CB ∠ ace ＝ CBD = 60 ° CE = BD ≠ ace ≌ CBD, ≠ CAE = BCD, AFG = CAF + ACF = BCD + ACF = 60 ° in △ ace and △ CBD, sin ∠ AFG = agaf, i.e. sin60 ° = 2AF, the solution is AF = 433