REVIEW
CONTENT
There are 5 chapters in this book. All of them are used to learn mathematics for Junior High School. The materials divided into 2 units that are:
Chapter:
1. Similarly
2. Three dimensional curved surfaces shapes
3. Statistic and probability
4. Exponents and Routs
5. Number sequence and series
We think that the content of this book is enough complete. There is a previous in every chapter that make the readers now what will they learn in this chapter. All of the chapters are arranged by some subtitle. It is complete with definitions, example problem (can also gives problem solving), some exercises and evaluations. Besides the exercises of every subtitle, there are exercises in the end of every chapter that content of solving mathematics problems. Exactly it is suitable with the material of this chapter. There are 20 multiple choices problems and 5 essays. In the end of every unit, there is an evaluation. This book is also be completed with “final evaluation” at the last part of this book. Student must solve 30 multiple choice problems and 10 essays.
Generally, this book is very good and interest for student. It content is suitable to the curriculum of studying n Junior High School. At this moment in Indonesia (suitable to KTSP). The problems in the exercises and the evaluations are realistic problems. We can find the problems in our daily activities. So, it makes the student can imagine and solve the problem easily.
This book is excellence because it is use a bilingual book. So, there are two languages (Indonesian and English) in one book. Every Indonesian page translates to English page directly. It is very useful, because after reading this book, students not only improve their mathematics skill and knowledge but also develop their English. We think this book is suitable to some schools that pioneer their school to be world class school in Indonesia.
Over all, the content of this book is complete enough and very simple to use. Not too difficult to understand all of the mathematics content of this book. The point plus of this book is about its bilingual. So we recommended this book to all of the student year IX. We hope it can help to learn mathematics be easier.
Problem
In our Opinion, the questions that included in this book already organized with the curriculum standard. The type of the questions is so variety, there are from the low level questions until the high level questions. And it can for knowing the level of understanding by every student. The questions which have provided are related to daily life. So, the students can know the meaning from each questions and the relation between the problems with our daily life.
The questions in this book can improve the creativity of the students which is already done the questions because most of the questions are high quality. In the end of the sub themes also provided sample questions with their solution. And it make the students can understand the themes more, really.
In this book is also provided sample exercises. Then, in the end of the themes is provided competition test. It can know the understood of the student with this theme. And in every mid semester, this book is provided mid semester test.
Beside it, this book is completed with the evaluation and the evaluation is located in the end of the semester. So the student can really understand the themes. The form of the questions is check point and essay. But in the exercises part is only essay. Then in the competition test, mid semester test and semester test are check point and essay. Because of the questions are so variety we think that the student will be happy to study this book. Unfortunately, this book isn’t completed with the final answer.
INTEREST
This book is interest enough to read especially for student who have an ideal to become a mathematician and an English expert all at once, in order to you don’t made mathematic source of misfortune. The third grade student of junior high school and full of challenge teacher need to understand the content of this book. Because in the midst of image that mathematic make don’t fell up for studying, need to look for a solution in order to can escaped from the disease mentioned above. Infraction of this book, the writer gives power of attraction that is:
1. Many colors that make us no sleepy and bored when we read or study this book.
2. We can easier to figure out with the picture.
3. Bilingual in order to later mathematic and English are balanced in our life
4. The writer has written many books. This is the fourth book that I know.
5. Succeeded to tell every day event that straight related with mathematic.
What we need to noted, the material was translated into English was not just translated without draft. If we keep follow the statements in every chapter of this book till the references, we find that the material with Indonesian in left page and material with English in right page. This book writer is also to pay attention grammar focus in order to can to be analyzed by public. Reading in detail about the student must finish up a new problem trickily, and I’m very interested in doing it or reading about other people doing it. Inclination up till now only orientation to Cambridge curriculum and the output to bring about lameness properly evaluated. Strategy with to maximize potency human resources was made compulsory.
Apparently this book certainly isn’t finish yet in the sense the step of mathematician and an English expert all at once in Indonesia still keep here. We are the next generation!



INFORMAtion
We can get many kind of information from this book. Beside can increasing our knowledge of mathematics (lesson), it cans also increasing our knowledge of some concept of mathematics in our real life. Some of the information is:
 In chapter I: When a part of sunshine is blocked by a certain object their will a shadow of the body compare our shadow and the tower shadow besides. By comparing our shadow and tower shadow we can measure the height of the shadow. We can use the concept of similarity to measure.
 In chapter II: If the building has a circle form with the similar diameter on every floor, then the sides of the buildings should be informing of curve. If the tortuous sides of the building are to be layered by glasses, so that the area of needed glasses could be get by using the concept of three dimensional curved surfaces shape.
 In chapter III: Rain is one of the natural phenomena on the earth. The highest average of rain density can be found in Cherrapunji, Bangladesh. The height of that region is 1.290 m above the sea level and average rain density is 1.270 cm so that it is called the wettest points on the earth. While the lowest average of rain density can be found in Atacama Desert, Chili. It has 0, 01 cm average of rain density so that it is called the driest point on the earth. Hence, the p probability of the rain in Atacama Desert is very low; moreover the area several place in Atacama Desert that has never been rained 400 th for predicting the rain density we can use the concept of statistic and probability.
 In chapter IV: If someone jumps from a high with original velocity is zero, then it is called free fall movement. The relation between the velocity and height of the man from the ground is formulated by V = where V is the velocity, g is the gravitation at the place, and h is the height from the ground. The form is one of the examples of roots that we can learn in chapter IV.
 In chapter V: When a ball fallen from a certain height on the flat ground, the ball will bounce back but with the lower height from its initial height. If the comparisons between the ball height at this moment and the ball height before outs constant, so we can calculate the height of the ball from the time it was fallen until it’s stopped using the geometric series.