Mình tổng hợp 1 vài đề bài các bạn lớp 8 vào làm thử xem sao nhé. Thời gian làm hết 10 câu này của các bạn hết bao nhiêu lâu?
1.
Two inner angles A and B of a quadrangle ABCD are both 90.
The third angle C is twice as large as the fourth angle D.
The difference of angle C and angle D of the quadrangle is… (degree)
2.
The diagonal length of a square with side length is …
3.
Three years ago,Nora was half as old as Mary is now.
If Mary is four years older than Nora,then Mary is … years old now.
4.
A number is 2 less than twice another number.
Their sum is 25.Then the greater number is …
5.
ABCD is a parallelogram with AB = 4,BC = 5
and the distance between C and AB is 3.
The distance between C and AD is…
6.
The sum of the age of Mai and Nam is 38 years.
Seven years ago,Nam was twice as old as Mai.
Then Nam is…years old now
7.
In a large fish tank,there are a total of 500 fish,
in three colors: blue,yellow and red.
80 of them have at least red and yellow on them.
70 of them have at least blue and red on them.
40 of them have at least blue and yellow on them.
If 20 fish are in all three colors,
There are… single – color fish in the tank.
8.
The distance from Singapore to Kuala Lumpur is 345 km.
How far apart (cm)will the two city be on a map with a scale of
1∶ 1 000 000?
9.
The product of the greatest negative integer and an even prime number is…
10.
The tickets for the Vietnam Idol were $6 for students and $9 for adults.
The total sale was $ 10 500.
Given that 250 more student tickets than adult tickets were sold,
the adult tickets were sold are…
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