look ! a man is running after the train.he wants to catch it

10 nha mình làm trên violympic rồi

1.he generally [sing]....sings.........in english,but today he [sing]...is singing........in spanish

Đặt số toa là a,số khoang là b,số khách tham quan là c,chỗ ngồi là d.       :)

Biết c = 870 , a = b x 8

a x 1 = b x (d x 4) = 32

a = 32/c

Số a để chở c : 870 : 32 = 27 (dư 6)

Vì dư 6/c nên cần 1 x a nữa.

Vậy cần 28 toa để chở hết 870 khách tham quan.

liêm sỉ

chắc là liêm sỉ 

1. is reading

2. rains/ is raining

3. worked

4. ????

5. eat

6. buys

7.is sleeping

8. do

9. is running

10.is

11.is traveling

12.???

13. s

14. loves

1.miss helen [read]...is reading.....a newspaper now.

2.it [rain]....rains..very much in the summer.it [rain]...is raining... now.

3.bad students never [work]....have worked......... hard.

4.he generally [sing].....sings........in english,but today he [sing]......is singing......... in spanish.

5.we seldom [eat].....eat..........before 6.30.

6.she sometimes [buy]....buys......... vegetables at his market.

7.be quite.the baby [sleep]....is sleeping...........

8.we always [do].......do.........our exercises carefully.

9.look.a man [run]......is running.........after the train.he[want] is wanting....to catch it.

10.it [be].......is....very cold now.

11.john [travel]........will travel........to england tomorrow.

12.i [need]............ some money for my texbook.

13.tom [].............to go to the museums.

14. mary [love]............ice-cream.

xời dăm ba cái bài này tui...........................ko thik làm 

+ Ta có: \(6n⋮6\forall n\)\(\Rightarrow\)\(6n+3:6\)dư  \(3\)

                                            \(6n-3:6\)dư  \(6-3=3\)

+ Ta lại có: \(6.\left(n+3\right)⋮6\forall n\)\(\Rightarrow\)\(6.\left(n+3\right)+3:6\)dư  \(3\)

Vậy \(6n+3,\)\(6n-3,\)\(6.\left(n+3\right)+3\)chia 6 dư 3

\(2.32.18+3.29.12+4.39.9\)

\(=36.32+36.29+36.39\)

\(=36.\left(32+29+39\right)\)

\(=36.100\)

\(=3600\)

\(2\cdot32\cdot18+3\cdot29\cdot12+39\cdot4\cdot9=32\cdot36+29\cdot36+39\cdot36=36\cdot\left(32+29+39\right)\)

       \(=36\cdot100=3600\)

2 . 32 . 18 + 3 . 29 . 12 + 4 . 39 . 9

= 32 . 39 + 32 . 29 + 39 . 36

= 32 . (39 + 29) + 39 . 36

= 32 . 68 + 39 . 36

= 32 . 68 + 78 . 18

= 32 . 68 + 68 . 18 + 18 . 10

= 68 . (32 + 18) + 18 . 10

= 68 . 50 + 18 . 10

= 68 . 10 . 5 + 18 . 10

= 10 . (68 + 18) + 68 . 5

= 10 . 86 + 68 . 5

= 2 . 5 . 86 + 68 . 5

= 5 .( 86 + 68) + 86 . 2

= 5 . 154 + 86 . 2

= 770 + 172

= 942                                                   

:)))

132 : 12 = (120 + 12) : 12 = 120 : 12 + 12 : 12 = 10 + 1 = 11

96 : 8 = (80 + 16) : 8 = 80 : 8 + 16 : 8 = 10 + 2 = 12

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