Uncle Wang bought 3kg apples and 5kg pears in the supermarket and paid 34.5 yuan. Aunt Li bought 1kg apples at the same price Apple and a kilogram of pear, paid 9.5 yuan, how many yuan per kilogram of apple and pear (did not learn the equation)

9.5 × 3 = 28.5 yuan
34.5 = 28.5 = 6 yuan
5-3 = 2kg
6 △ 2 = 3 yuan / kg Unit price of pear
9,5-3 = 6.5 yuan / kg Unit price of apple

Uncle Li spent 22.5 yuan on 3 kg apples and 5 kg pears. Aunt Wang spent 5.5 yuan on 1 kg apples and 1 kg pears
How much?

Vegetable rabbit,
Apples per kilogram: (5.5 × 5-22.5) / (5-3) = 2.5 yuan
Pear per kilogram: (22.5-5.5 × 3) / (5-3) = 3 (yuan)

1+2+3+4+5+6+7+8.+1000=?

Let x = 1 + 2 + 3 + 4 +... + 999 + 1000. From the law of additive commutation, we can see that x = 1000 + 999 + 998 +... + 2 + 1. By adding the two formulas, we can get: 2x = 1001 + 1001 + 1001 +... + 1001 + 1001 = 1000 × 1001

What are the poems, idioms, sayings and proverbs about cattle

The power of nine oxen and two tigers

The average of five numbers is forty. If one of them is counted as eighty, the average is fifty. What is the number

This number = 80 - (50-40) × 5
=80-50
=30；
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2.5x-1 = 4 how to solve the equation

2.5x-1=4
2.5x=5
x=2

What are the stories of Three Kingdoms, outlaws of the marsh, journey to the West and dream of Red Mansions?
Please mark the title of the book before the story,

Three Kingdoms: Taoyuan, sanyingzhan and Lvbu
Water Margin: three dozen ZHUJIAZHUANG
Journey to the West
Dream of Red Mansions: Granny Liu's three visits to Grand View Garden

20 * 40 = 800, 42 * 20 = 840, 25 * 10 = 250, 20 * 15 = 300 what rules can be seen through calculation

When multiplying two two digit numbers, if the single digit of the multiplier is 0, go to 0 first and then multiply. The result is the product obtained and then add the 0

How to do 999 + 99 + 9? Simple calculation

999+99+9
=1000-1+100-1+10-1
=1110-3
=1107

The mathematics interest group held a test. There were 15 questions in the whole paper. It was stipulated that 8 points would be deducted for each right question and 4 points would be deducted for each wrong question. Xiaoying got 72 points in total, and she did it right______ Question

The wrong questions are: (8 × 15-72) △ 8 + 4, = (120-72) △ 12, = 48 △ 12, = 4 (DAO); he did right: 15-4 = 11 (DAO); a: he did right 11 questions. So the answer is: 11

Uncle Wang bought 3kg apples and 5kg pears in the supermarket and paid 34.5 yuan. Aunt Li bought 1kg apples at the same price Apple and a kilogram of pear, paid 9.5 yuan, how many yuan per kilogram of apple and pear (did not learn the equation)