đề thi violympic vòng 6 bài thi số 3 toán lớp 8

... : BÀI THI S Ố Hãy điền số thích hợp vào chỗ ! Câu 1: Một hình chữ nhật có chu vi 18 0m Chiều dài gấp rư i chiều r ộng Tính ỡ diện tích hình chữ nhật Trả lời: Diện tích hình chữ nhật Câu 2: 19 2 ... 10 00 - 34 5 + 34 5 : y = 655 + 34 5 : y= Câu 7: Tìm s ố bị chia phép chia có th ươ b ằ 23 s ố d b ằ s ố d đ ng ng ng ó s ố d l nh ấ có th ể có ... ng o l 48kg g t ẻ 30 kg g n ế Tính s ố...

Ngày tải lên: 10/05/2015, 10:00

... Câu 9: Đơn vò đo tần số là: a m/s b Hz( héc) c dB (đêxiben) d s (giây) Câu 10: So sánh vận tốc truyền âm truyền qua môi ... Xác đònh góc phản xạ vẽ tia phản xa ïIR?(1đ) S N 450 ////////////////////////////////////// I Câu 3: Một tàu phát siêu âm thu âm phản xạ đáy biển sau giây(s).Tính độ sâu gần biển? Biết vận tốc truyền

Ngày tải lên: 30/11/2013, 06:11

... should replace the blank above to make the number sentence true? A 15 B 45 C D 13 Which letter represents the ordered pair (3, 5) ? A P B M C O D N Which of these shapes could be made with ONLY ... 3 A function machine multiplies a number by What number would you get if you put an x into the function machine? A - X B x X C X - D X /5 15 x ? = 75 What number should replace ... A and B...

Ngày tải lên: 01/02/2016, 00:27

... ml C 20 ml D 12 ml Rasheed has 3, 9 75 books to distribute to classrooms If there are 25 classrooms and each of them gets the same number of books, how many books go to each room? A 119 B 129 C ... double the number of books she read last year How many books did Donna read last year? A B C D 11 22 33 44 Which two spinners above would give you an equal chance of spinning a C? A I and II...

Ngày tải lên: 01/02/2016, 16:38

... 18% 27% 36 % 45% Which expression does NOT equal a multiple of 12? A B C D 3x4x5 2x2x2x3 x 11 x 12 10 Which of the following statements is true? A B C D 1.0 254 > 1.24 1.17 63 > 1.199 1.9 78 > 1 .89 79 ... ten-thousandths”? A B C D 4 .32 4. 032 4.0 032 432 ,000.00 Sarah bought these flowers If she gave the clerk $10.00, how much change should she have received? A B C D $2. 73 $2 .37 $1. 7...

Ngày tải lên: 01/02/2016, 16:38

... line? A B C D hour, minutes hours, minutes hours, 38 minutes 13 hours, 38 minutes 38 × 53 = ? What is the answer for this expression? A B C D 30 4 1,614 2,014 2,824 Gerald had some peanuts He divided ... a capacity of 4000mL How much coffee can it hold? (1L = 1000 mL) A B C D 487 L 50 L 48,6 75 mL 4L 10 The volume of this rectangular prism is 72 cubic meters What is its height? A B C...

Ngày tải lên: 01/02/2016, 17:00

... (7, 7) (6, 6) (6, 5) (5, 6) Lark bought the two shirts shown above If the prices shown include tax, what was the total cost of the two shirts? A B C D $39 .26 $39 .36 $40.26 $40 .36 For her report ... the shaded part in the square? A B C D Which of the following has a value greater than 5/ 6 ? A 5/ 9 B 2 /3 C 11/12 D 10/12 Which unit would most often be used to determine the mass of one d...

Ngày tải lên: 01/02/2016, 20:48

... blocks did she use? A B 11 C 13 D 14 What should Paulo think about to make it easier to multiply 37 × 99 in his head? A B C D 99 as 100 37 as 35 99 as 90 37 as 30 Zack is making figures using ... C 2 85 D 3 15 Which number should go in the square for the number pattern above? A 12 B 15 C 16 D 18 Which of the following numbers is less than 4.1? A 4. 13 B 4.11 C 4.20 D 4.09 ... will...

Ngày tải lên: 01/02/2016, 20:54

... C 0 .50 D 0. 75 While cooking, Marie used these amounts of milk How much milk did she use altogether? A B C D 3/ 2 cups 5/ 4 cups 3/ 12 cups 3/ 4 cups Which is the suitable ... 0.11 km 0. 17 km What is the standard number form for two hundred ninety-five thousand, eight hundred four? A B C D 2 95, 804 259 ,000 59 2,048 804,2 95 10 What is the standard number form for 70 ,000+ ... 35...

Ngày tải lên: 01/02/2016, 21:00

... number of quilt pieces needed to make this quilt? A 10 B 15 C 32 D 60 Which of the following fractions are NOT equal? A 2/6 and 1 /3 B 4/ 6 and 2 /3 C 1 /4 and 2 /3 D 2 /4 and 1/2 The chart shows the number ... Susan wants to jog 10 miles this week On Sunday, she jogged 1 /4 miles On Monday, she jogged 3 /4 miles How many more miles does she need to jog this week? A B 4/ 8 C D 14...

Ngày tải lên: 01/02/2016, 21:04

... be in his next group? A B C D 15 25 35 45 The leg of an average six-foot tall man has a femur that is 48 centimeters long What is the length in millimeters, of this femur? (1 cm = 10 mm) A B ... only shows the decimal value of weight What is the decimal equivalent of 3/ 4 lb.? A B C D 0. 25 0. 75 1. 75 75. 00 Tommy, Lisa, and Chris each wants an equal portion of the pizza Which pictur...

Ngày tải lên: 01/02/2016, 21:27

... between the greatest and least numbers in the data) A B C D 40 8 What is 35 . 57 rounded to the nearest whole number? A B C D 25 36 47 89 The continent of North America accounts for 20% of the land ... best represents the land area of North America? A B C D 1 /3 1/4 1 /5 1/8 10 Which expression does not equal to a multiple of 27? A B C D 3x3x3 9x9 x 21 x 27 ... 30 feet 40 feet 50 feet 6...

Ngày tải lên: 01/02/2016, 21:35

... number greater than five? A 1/8 B 3/ 8 C 5/ 8 D 1/2 Bengy's restaurant has its bread and meat delivered from a wholesale store Bread is delivered to the restaurant every third day Meat is delivered to ... What is the approximate measure, in degrees, of the angle XYZ Paul has drawn? A 16° B 44° C 134 ° D 136 ° quarts of red paint, quart of brown, pints of orange, gallons of white, quarts of...

Ngày tải lên: 01/02/2016, 21:45

... will be the total cost for milkshakes? A B C D $ 15. 00 $14 .50 $ 13 .50 $ 13. 00 10 Which decimal number means the same as 3/ 4 ? A B C D 0 .34 0 .51 0. 75 3. 4 ... farmer planted 36 trees Of these trees, 75% are apple trees How many trees are apple trees? A B C D 18 27 30 35 Which number is greater than 1/2 ? A B C D 0.7 0. 25 0.48 0.299 Since 1 932 , no batting ... many hits must...

Ngày tải lên: 01/02/2016, 21:50

... find the number of home runs Elizabeth made this season? A B C D R 3 R +3 R -3 Rx3 The picture above shows what happened when the numbers 2, 9, and 16 were put into the same number machine If the ... from birth to age 50 ? A B C D 10 A 15- centimeter-long piece is cut from a ribbon of meter long What is the length in centimeters of the remaining piece? A B C D 85 1 15 9 85 10 15 .....

Ngày tải lên: 01/02/2016, 22:04