ko có cách giải

vì 20000,,,,-9000 ko có nghĩa

de the ko biet lam

chịu chịu

a) 50000 + 20000 + 10000 = 80000

80000 - (30000 + 20000) = 30000

b) 80000 - 30000 - 20000 = 30000

50000 + (20000 + 10000) = 80000

a) 30000 + (20000 + 40000) = 90000

    30000 + 20000 + 40000 = 90000

    60000 - (30000 + 20000) = 10000

    60000 - 30000 - 20000 = 10000

b) 40000 x 2 : 4 = 20000

    36000 : 6 x 3 = 18000

    20000 x 4 : 8 = 10000

    60000 : 3 x 2 = 18000

số cần tìm là :

20000+20000=40000

dáp số : 40000

20000+20000=40000

20000+20000=40000

20000+20000

=20000x2

=40000

K mik mik k lại

20000 + 20000 = 40000

20 000 + 20 000= 40 000

ai k mình , mình k lại 

C

20000-(30000-20000)

=20000-30000+20000

=(20000+20000)-30000

=40000-30000

=10000

= 10 000 nhé bn

20000 - ( 30000 - 20000 )

= 20000 - 10000

= 10000

Old man:  Can you please do me a favor?   Ba: ...............

       A. Yes. Please help me                                       B. Sure. How can I help you?

       C. Yes, you can                                                     D. No, you can't

 Câu 7. The children can look after ............................... for a few days.

       A. them                           B. they                          C. themself                   D. themselves

 Câu 8. My grandfather used ____________ us to the zoo when he was alive.

       A. took                             B. to take                     C. taking                       D. take

 Câu 9. Choose the underlined word or phrase in each sentence  that  needs correcting.

         The armchair is in the living-room among the television and the sofa.

                       A        B                                        C                                 D

Câu 10. My hometown is getting more modern and .....................

       A. more noisy                B. noisier                     C. noisiest                     D. more noisier

 Câu 11. The water wasn't ____________ in.

       A. clear enough for swimming                         B. enough clear for swimming

       C. enough clear to swim                                    D. clear enough to swim

 Câu 12. Choose the word that has the underlined part pronounces  differently

       A. looked                        B. phoned                   C. missed                      D. watched

 Câu 13. Don't come in. Pleased wait ____________ for your turn.  

       A. outside                       B. inside                       C. downstairs              D. upstairs

 Câu 14. We must be there....................7.30 and 10.30.

       A. between                     B. at                              C. after                          D. before

 Câu 15. His father is very proud  ________  him.

       A. on                                B. about                       C. of                               D. with

 Câu 16. They …………….. in that house for 3 years.

       A. have lived                  B. live                            C. lived                          D. are living   

 Câu 17. Choose the word that has a different stress pattern from the others.

       A. plentiful                      B. generous                C. volunteer                 D. sociable

30000 + 40000 – 50000 = 20000

(nhẩm : 3 chục + 4 chục – 5 chục = 2 chục nghìn )

80000 – (20000 + 30000 ) = 30000

80000 – 20000 – 30000 = 30000