có 2 hộp kẹo 2/5 số kẹo hộp 1 = 1/3 số kẹo hộp 2 . cả 2 hộp có 56 viên . Hộp nào hơn , hơn mấy viên ?
Giải giùm Yến Nhi nhé nhớ ghi rõ cách giải
Một hình chữ nhật có chiều dài 16m,chiều rộng 10m.nếu chiều dài tăng thêm 4m thì diện tích của hình chữ nhật sẽ tăng lên bao nhiêu phần trăm?
Đáp án 25 % nhớ ủng họ giùm Yến Nhi nhé
Fill in the blank with the suitable number (Note: write decimal number with "the dot" between number part and fraction part. Example: 0.5)
Câu 1:
4.62 x 7.5 = 7.5 x 4.62
The missing number is
(Write your answer as a decimal in the simplest form)
Câu 6:
163.4cm - 45.24cm = 118.16 cm.
The missing number is {}
(Write your answer as a decimal in the simplest form)
Câu 9:
A rectangular garden is 25.04m long, the width is 3/4 of the length. Find the perimeter of the garden?
Answer: 87.64 m
(Write your answer as a decimal in the simplest form)
Câu 10:
A rectangle has width of 18.25m. The length is 4.75m longer than the width. Find the area of that rectangle?
Answer: The area of that rectangle is 419.75 m2.
(Write your answer as a decimal in the simplest form)
Câu 3:
Calculate: 4.72 x 100 = 472
Câu 8:
Calculate: 5dm7cm + 8m4dm = 8.97
(Write your answer as a decimal in the simplest form)
Câu 2:
Calculate: 7.34 - 6.27 = 1.07
(Write your answer as a decimal in the simplest form)
Câu 4:
Calculate: 21.8 x 5 = 109
Câu 2:
Calculate: 28.2 + 31.95 = 60.15
(Write your answer as a decimal in the simplest form)
Câu 4:
Calculate: 36.26 x x 10 = 362.6
(Write your answer as a decimal in the simplest form)
Câu 5:
Calculate: 42.75 x 39 - 42.75 x 29 = 427.5
(Write your answer as a decimal in the simplest form)
Câu 9:
Calculate: (48.6 x 2.4 - 24.3 x 4.8) x 20.15 x 46.92 = 0
Câu 3:
Calculate: 57.71 - 35.29 = 22.42
(Write your answer as a decimal in the simplest form)
Câu 1:
Calculate: 84.4 : 8 = 10.55
(Write your answer as a decimal in the simplest form)
Câu 6:
Calculate: 345.58 x 4.9 - 45.58 x 4.9 = 1470
Câu 5:
Find the value of 2.8 x (4.3 + 8.1).
Answer: 34.72
(Write your answer as a decimal in the simplest form)
Câu 8:
Find the value of x such that x + 8.04 - 9.34 = 16.31.
Answer: x = 17.61
(Write your answer as a decimal in the simplest form)
Câu 4:
Find the value of x such that x + 47.92 = 89.27.
Answer: 41.35
(Write your answer as a decimal in the simplest form)
Câu 9:
Half of the perimeter of a rectangular school yard is 0.24km. The width is 1/2 of the length. Find the area of the yard in square meters?
Answer: The area of the yard is 12800 m2
Giải:
Câu 3:
Multiply: 2.34 x 7 = 16.38
(Write your answer as a decimal in the simplest form)
Câu 5:
The sum of the smallest 3-digit number and 27.02 is 127.02
(Write your answer as a decimal in the simplest form)
Câu 7:
The sum of two numbers is 10.54 and their difference is 1.94. The greater number is 6.24
(Write your answer as a decimal in the simplest form)
Câu 7:
The value of 5.25 4.2 +8.91 is 30.96
(Write your answer as a decimal in the simplest form)
Câu 10:
Tom bought 3.5kg apples and 2.4kg oranges. If the apples cost 5 dollars per kilogram and the oranges cost 6 dollars per kilogram. How much did Tom spend altogether?
Answer: 31.9 dollars
(Write your answer as a decimal in the simplest form)
Câu 10:
What is the difference between the largest and the smallest possible distinct 4-digit number that you can make from four digits 0, 4, 2 and 3?
Answer: Their difference is 2286
Bài thi số 3: Vượt chướng ngại vật
Calculate: 4.75 x 8.2 : 2 = … Answer: 19.475
Calculate: 8.4 x 2.6 - 8.92 = … Answer: 12.92
Calculate: 11.13 + 13.15 + 15.17 + 17.19 + 19.21 + 21.23 + 23.25 + 25.27 + 27.29 + 29.31 + 31.33 = …hm. Answer: 233.53
Convert: 9km 72m = …hm. Answer: 90.72
Find two numbers if their sum is 13.96 and their difference is 2.72 Answer: 8.34 and 5.62
If: x x 4 = 21.64 then 2.5 x x = … Answer: 13.525
If: x is a natural number and x > 25.092 then the smallest value of x is … Answer: 26
Multiply: 0.025 x 400 = … Answer: 10
Multiply: 37.92 x 0.01 = … Answer: 0.3792
Multiply: 241.82 x 0.1 = … Answer: 24.182
There are 9 packages of rice which weigh 403.74kg. How many kilograms do 15 such packages of rice weigh? Answer: 672.9
There are 362 tonnes of rice in a store. They took out 271.48 tonnes of rice. How many tonnes of rice are left in the store? Answer: 90.52
