Math problems of the fifth grade last semester

◆2.5× 1.25×0.32

◆999×875+87.5

◆4.56×0.27+483×0.0456+ 1.9×4.56+0.456×30

◆3.49+4.47+3.5 1+2.38+4.53+2.62

◆37. 19—(25.68—2.8 1)

Fifty students went boating, and one took 1 1 boat. Among them, there are 6 people in each big ship and 4 people in each small boat. How many big boats and small boats are there?

The circumference of a rectangular blackboard is 96 decimeters, and its length is three times its width. What is the area of this rectangular blackboard?

◆ Party A and Party B ride bicycles from East Village to West Village at 8 am, and Party A is 6 kilometers faster than Party B every hour. At noon 12, a returns to the east village immediately after arriving in the west village, and meets b at a distance of 0/5 km from the west village/kloc-0. How many kilometers are the two villages apart?

◆ Xiaohong's 24.9 yuan can just buy 5.25 Jin of apples and 4.25 Jin of oranges. She reversed the quantity she bought, leaving 0.4 yuan, so how much are apples and oranges per kilogram?

What is the184th place after the decimal point of 0.28571428 5714 ... If the sum of the decimal places before a number is 582, what decimal place is this number?

◆ The average of A, B and C is 5.7, and half of C and B is 4.5, so what is the number of A?

◆0. 1+0.3+0.5+0.7+0.9=0. 1 1+0. 13+0. 15+0. 17+……+0.99=

◆ A bucket of water weighs 9.6 kilograms. After pouring half of the water, the bucket weighs 5.6 kilograms. So how many kilograms of raw water is it? How much does this bucket weigh?

◆ It is known that A= 128.7×2.5 and B= 128.7×2.4. Compare the size of a and b. ..

◆ When Xiao Mahu divides 30.6 by a number, because the decimal point of the quotient is one place to the right, the result is 204. What is the divisor of this question?

◆ A line can form a rectangle with a length of 1.6m and a width of1.2m. If it is used to form a square, what is the area of the square?

During the Spring Festival, you can buy 3 yuan for each bag of washing powder in the supermarket. If it exceeds 6 packs, you can get a discount of 1 yuan per pack. My mother bought some washing powder, and when I got home, I counted the average 2.6 yuan per bag. How many bags of washing powder did my mother buy?