Is a bottle of ordinary mineral water the same weight when it freezes as when it doesn't

Is a bottle of ordinary mineral water the same weight when it freezes as when it doesn't

Similarly, because the density of water becomes smaller after freezing, but the volume becomes larger, and the total mass remains unchanged

A bottle of mineral water weighs 700g. After half of it is poured out, 375 G is left. How heavy is the bottle? How heavy is the water

700-375＝325.
325 × 2 = 650 water weight
700-650 = 50 bottles

A box of milk is 3 yuan, buy six get one free. There are 51 people, each person a box, at least how many yuan
There are 51 people in our class. If each person has a box of milk, how much will it cost at least

51÷（6+1）＝7…… two
Need to buy 6 × 7 + 2 = 44 (box)
Total cost: 44 × 3 = 132 yuan

How much does it cost mom to buy 15 bags of milk? 2 bags of 5 yuan. 1 bag of 3 yuan

15=14+1=2х7+1
5х7+3=38

29 and 3 / 5 minus 1 and 1 / 3 minus 15 and 1 / 4 plus 3 and 2 / 3 minus 2 and 1 / 3 minus 14 and 2 / 5 plus 0.25, how much is it!
There is another way:
Y = a * x 4 times + b * x 2 times + C, when x = - 5, y = 3, find the value of y when x = 5

29 and 3 / 5 minus 1 and 1 / 3 minus 15 and 1 / 4 plus 3 and 2 / 3 minus 2 and 1 / 3 minus 14 and 2 / 5 plus 0.25
=(29 3 / 5-14 2 / 5) + (3 2 / 3-2 1 / 3-1 1 / 3) - 15 1 / 4 + 1 / 4
=15 and 1 / 5-15
=1/5
Y = a * X4 times + b * x2 times + C
When x = - 5, y = 3
There is 3 = 625a + 25B + C
When x = 5
y=625a+25b+c=3

English composition letter format, the best model

Dear My Friend,How are you?Do you want to know about my English study?OK,I will tell you.I study English at Sunday afternoon at two o'clock.I study JianQiao English.And ,last Saterday I took part in th...

() minus (5 out of 8 minus 1 out of 3) equals 0, () plus 12 out of 17 plus 13 out of 15 equals 2

(7 / 24) minus (5 / 8 minus 1 / 3) equals 0, (109 / 255) plus 12 / 17 plus 13 / 15 equals 2

English composition letter format for distant friends
Suppose you are John, write a letter to your friend, Danny, in Canada. New content: Thank you for the postcard. You like it very much. Everything is fine in Beijing. Chinese people are very friendly. You like Chinese food very much. School has five days a week. Four in the morning and two in the afternoon from Monday to Friday. Your classmates teach you Chinese and you teach them English. They like to make friends with you very much

Dear Danny,Thank you very much for your postcards, I like them very much. Everything is fine in Beijing,and the Chinese people are very friendly. I like Chinese food very much. I go to school from Mon...

What's 15 and 11 / 3 minus 5 and 11 / 3 minus 2 and 13 / 7

15 and 11:3 minus 5 and 11:3 minus 2 and 13:7
=10-2 and 7 / 13
=7 and 6 / 13

A letter to a friend

Dear TomI am very bad,Because i failed in my Month Exam.That is bad.In this exam,my English and Physics are bad.For that ,i do not know how to do,i am very sad.i thank i triedhard,but the result is dispointed.However ,to my surprise,my chinese and math are ok.That is not terrible.I think i should more work hard to improve my studies,only that , I can study better, what about you? See you only