Elementary school 6th grade winter vacation homework problems, 6th grade winter vacation homework pr

Solution: Set the armor for x days first.

x/12＋（16-x）/18=1

3x+2(16-x)=36

3x+32-2x=36

x=4A: A did it for 4 days

Solution: Let A do x days, then B does (16 x) days. From the inscription, it can be seen that A's work efficiency is 1 12, and B's work efficiency is 1 18. Can be listed:

x*(1 12)+(16 x)*1 18=1 solves the equation to obtain:

x 4 so the number of days B worked should be 16 4 12 days.

Solution: Let A do x days first, then B does (16-x) days.

1/12*x+1/18*（16-x）＝1

x=4A: A did it for 4 days

Let A do x days, then B does (16-x) days.

1/12）x+(1/18)(16-x)=1

x=4So, A did it for 4 days and B did it for 12 days.

1.A to B 150 3 4 = 200 km.

It takes 2 3 4 = 8 3 hours 2The average score of Class 6 (1) in this exam is (96*3+89*2) (2+3)=3.A has (185-5) (3+3+4) 3=54 yuan 4

The unit price ratio of A and B exercises is 3 4:4 3+9:165

Armor. The ratio of the edges to length of the two cubes is 3:4, and the ratio of the sum of their edges is (3).

4), the ratio of the base area is (9) :(16), the ratio of the surface area is (9) :(16), and the ratio of volume is (27).

1.A to B 150 3 4 = 200 km.

2.First find the velocity v=150 2=75, so it takes 200 75=8 3 hours for the flower to go from A to B.

1.Learn from each other's strengths, be self-defeating, remember the bitter and sweet, lose the big because of the small, plausible, self-denial, 2Sluggish.

3.Shi Nai'an, Luo Guanzhong.

4.At the Ao (áo) Bao meeting, archery and wrestling showed the strength of the small herdsmen;

Holding ha (hǎ) in hand, singing and dancing vigorously, offering good wishes to friends.

Not the rest.

Take (long) make up for (short) make (skillful) into (clumsy) because (small) loss (big) like (is) and (not).

Learn from each other's strengths, make self-defeating, and take people from others.

Slowly, Shi Nai'an, Luo Guanzhong.

Learn from each other's strengths and make up for their weaknesses and make self-defeating mistakes.