5th grade decimal application problems, primary 5th grade math application problems

Originally, the teacher asked Xiao Ming to buy x exercise books.

x = 17 copies.

Need a process? Assume in the simplest way, and the answer comes out. Suppose the small cubes are lined up. The length of the edges on both sides is 16, 72-16 = 56, the length of the long edges is four, 56 4 = 14, 14 2 = 7, the answer is 7.

10 points for a correct one, 150 points for copying and assuming that 15 questions are done correctly, and the actual score is 88 points, so the difference is 62 points, therefore, 62 points is the loss of points for the wrong question and the question that is not done, 4 points will be deducted for the wrong question, and the actual wrong question will be 14 points less, and if you don't do 0 points, you will get 10 points less, then 62 points just include 3 14 points and 2 10 points. So she answered 10 questions correctly, got 3 questions wrong, and didn't do 2 questions.

If you buy 10 towels, it will cost 64 yuan, and now you have spent a total of 118 yuan, which means that the towels you bought are more than 10, so the number of towels you buy is, (118-10 towels.

(118-10×

So Aunt Liu bought back 12 + 10 = 22 towels.

(32 * Drainage Fee + 32 * Water Charge) 2= (Yuan) Brother Instant's miscalculation There is no such number as 34 at all.

jianjdiaodiu he didn't know how to say it and was absolutely wrong anyway.

The total cost of two months = 34 * yuan), the average cost of each month = yuan).

Water charge) + (drainage fee) = yuan in the division by 2 ah people are sharing 32 cubic meters.

The bottom is: 8-3=5cm

Height: 24 8=3cm

The original area of the trapezoid is: (8+5)*3 2=square centimeters.

Then it turns out that the bottom is xcm

x+3=8x=5, that is, the bottom is 5

Let the height of this figure be ycm

8y-（8+5）y/2=24

Then you do the math yourself.

After calculating y, substitute it into the trapezoidal area formula.

Because: if you pour 3 cups, then the total weight of the bottle is 440 grams, and if you pour 5 cups of water, then the total weight of the bottle is 600 grams.

So: 2 cups of water weigh 160 grams, and 1 cup weighs 80 grams. So 1 empty bottle weighs 200 grams.

600-440) (5-3) = 80 (g) 440-3 * 80 = 200 (g).

A: 1 cup of water weighs 80 grams, and 1 empty bottle weighs 200 grams.

The first method: 600-440 = 160 (grams).

160 (5-3) = 80 (grams).

600-80 5 = 200 (grams).

A: 1 cup of water weighs 80 grams, and 1 empty bottle weighs 200 grams.

The second method:

Solution: Set: A glass of water weighs x grams, and an empty bottle weighs y grams.

3x+y=440

5x+y=600

The solution yields x=80 and y=200

A: 1 cup of water weighs 80 grams, and 1 empty bottle weighs 200 grams.

1 cup of water weighs (600-440) (5-3) = 80 grams.

An empty bottle weighs 440-80 3 = 200 grams.

Pour an extra 5-3 = 2 glasses of water.

Weight increased: 600-440 = 160 grams.

1 cup of water: 160 2 = 80 grams.

Combined: (600-440) (5-3) = 80 g 1 empty bottle: 440-80 3 = 200 g.

Amount of increase Number of servings = unit "1" (glass of water).

600-440) (5-3) = 80 grams.

Total weight - amount of water = weight of bottle.

600-80 5=200 g or 440-80 3=200 g.

A bottle of water weighs 600-440 = 160, 160 2 = 80

An empty bottle weighs 440-3 80=200

20+x)*30/20=30+

It takes 30+ minutes for my brother to get from home to school.