ví dụ 5 x 2 x3 

          2 x 1 x 3   có nghĩa là năm nhân hai nhân ba phần hai nhân một nhân ba.

1.tính theo mẫu: 

M: 5 x 6 x 7 x 9 = 5 x 6 x 7 x 9 =       5

     12 x 7 x 27 = 6 x 2 x 7 x 9 x 3 =    6

a ) 3 x 4 x 7=......................................................

     12 x 8 x 9=.....................................................

B) 4 x 5 x 6 =......................................................

    12 x 10 x 8=....................................................

c) 5 x 6 x 7 =........................................................

   12 x 14 x 15=......................................................

nhớ làm nhanh giùm mình nha Vở bài tập toán lớp 4 tập 2 trang 25 bài 3

Đề thi vòng 9 cấp thành phố năm ngoái, các bạn thi cấp Thành phố năm nay tham khảo nhé:

Exam number 1:

Câu 1:Amy and Ben have 70 cakes together. If Amy gave Ben 5 cakes, then they have the same number of cakes. How many cakes did Ben have at the beginning?. The result is….cakes

Câu 2:The length of a rectangular garden is 3m more than is width. If the length of the garden is 9m, then the area of the garden is….m2

Câu 3:Susan had 60 trading cards. After giving away g cards and receiving r cards, she had 70 cards. The value of r – g is…

Câu 4:Mike takes 400 dollars on shopping. He spends 1/5 of his money on DVDs. How much money does Mike spend on the DVDs?.

Câu 5:What is the next number in this pattern? 100,101,96,72,92,93,88,89….

Câu 6:2 oranges and 2 apples together weigh 790 grams

3 oranges and 2 apples together weigh 960 grams

How much does an apple weigh?

Assume all the apples weigh the same and all the oranges weigh the same

Câu 7:Minh reads a 200-page-book. How many time does the digit”4” appear on the page numbers of the book?

Câu 8:If ( c + b) – ( b + a) = 7; ( b + c) – ( c + a) = 3; ( c + a) – ( a + b) = 4 and 0 < a; b,c < 9 then abc=…

Đề cấp Thành phố Toán- Tiếng Anh năm ngoái, các bạn thi năm nay tham khảo nhé:

Exam number 2:

Câu 1:Tina and Carol are traveling to HCM city. Tina’s plane arrives at 8: 30 AM. Carol’s plane arrives 2 hours and 30 minutes later. What time does Carol’s plane arrive?

10.30          8.30            9.30          11.30

Câu 2:Which statement is always true?

Odd number x 3 = even number

even number x 3 = odd number

even number x 2 = even number

Odd number x 2 = even number

Câu 3:What is 1860 written in words?

One thousand eight hundred sixty

One thousand eight hundred six

Eighteen thousand six hundred

Eighteen thousand sixty

Câu 4:How many triangles do you see?

12       8             10          6

Câu 5:There are 6 book cases in a house. Each book case contains at least 125 books but not more than 160 books. Which of the following could be the total number of books in all 6 book cases?

500       725       925        1005

Câu 6:Which fraction is not equivalent to the others?

44/132        15/45            3/6            4/12

Câu 7:Which of the following triples (a,b,c) does Not satisfy a x b + c= 21

2,10,2               4,5,1              3,3,12               5,4,1

Câu 8:There are k students in a class, only one of whom is a junior. If 5 seniors are added to the class, how many students in the class will noi be juniors?

K + 4        k + 1          k + 2       k + 3

Tớ đăng bài này dành cho các bạn thi Thành phố Toán- Tiếng Anh. Đây là đề thi Vòng 9 cấp thành phố năm ngoái, các bạn tham khảo nhé:

Exam number 3:

Câu 1:The sum of Jack and Jill’s age in 48 years. Jack is twice Jill;s age. How old is Jill?

Câu 2:Convert: 31000 cm2=….dm2

Câu 3:If Mai reads 2 pages per minute, then she reads….page in an hour

Câu 4:Ms Clark has a total of 42 flowers. There are 6 flowers in reach bunch. How many bunches of flowers Ms Clark has?

Câu 5:The area of a square is 64m2. What is its perimeter?

Câu 6:The average of three numbers is 50. A 4^th number is added to the list. The new average is now 100. The 4^th number is

Câu 7:One side of a square is 475dm. What is its perimeter?

Câu 8:If M is a natural number 201 < M + 2< 403 and M + 4 is divisible by 9 then the greates possible value of M is…

Câu 9:This year, January 22^nd is Monday. How many Mondays are there in the same year?

Câu 10:Frank has 217 stickers. John has twice as many stickers as Frank’s.

Câu 11:Write for the equivalent fractions: 3/5….9/…..

Câu 12:Fill in the blank 48 x 30 minutes…….hour(s)

Câu 13:When a certain number is multiplied by ¼ and the product is then multiplied by 32, the result is 96. The certain number is

Câu 14:If ab –ba= 27 and a + b = 9 then ab

Câu 15:There are 7 people at a party. If each person shakes hands once with all the other, how many hand shakakes toke place at the party

\(\frac{1}{3}\)+ \(\frac{3}{4}\)x \(\frac{5}{9}\)=

\(\frac{7}{12}\)-\(\frac{5}{4}\)x\(\frac{2}{15}\)=

y+\(\frac{1}{4}\)=\(\frac{7}{8}\)-\(\frac{3}{8}\)

y-\(\frac{5}{12}\)=\(\frac{2}{3}\)-\(\frac{1}{4}\)

\(\frac{12}{7}\)x y=\(\frac{16}{21}\)

\(\frac{5}{4}\): y =\(\frac{7}{12}\)