Question

tính bằng cách thuận tiện nhất

168+2080+32

87+94+13+6

121+85+115+469

 

Answer 1

168 + 2080+ 32

= ( 168 + 32 ) + 2080

= 200 + 2080

= 2280.

87 + 94 + 13 + 6

= ( 87 + 13 ) + ( 94 + 6 )

= 100 + 100

= 200.

121 + 85 + 115 + 469

= ( 121 + 469 ) + ( 85 + 115 )

= 590 + 200

= 790.

Answer 2

a, 168+2080+32

=(168+32)+2080

=200+2080

=2280

b,87+94+13+6

=(87+13)+(94+6)

=100+100

=200

c,121+85+115+469

=(121+469)+(85+115)

=590+200

=790

Answer 3

168+2080+32=(168+32)+2080=200+2080=2280

87+94+13+6=(87+13)+(94+6)=100+100=200

121+85+115+469=(121+469)+(115+85)=590+200=790

k mk nha bn

Answer 4

168+2080+32                                 87+94+13+6                                  121+85+115+469

= (168+32)+2080                          =(87+13)+(94+6)                           = (121+469)+(85+115)   

=200+2080                                  =100+100                                     = 590+200 

=2280                                          =200                                            = 790

Answer 5

168 + 2080 + 32

= ( 168 + 32 ) + 2080

= 200 + 2080

= 2280

87 + 94 + 13 + 6

= ( 87 + 13 ) + ( 94 + 6)

= 100 + 100

= 200

121+85+115+469

= ( 121 + 469 ) + ( 85 + 115 )

= 590 + 200

=790

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Answer 6

168 + 2080 + 32

= ( 168 + 32 ) + 2080  = 200 + 2080 = 2280

87 + 94 + 13 + 6 

= ( 87 + 13 ) + ( 94 + 6 ) = 100 + 100 = 200

121 + 85 + 115 + 469 

= ( 121 + 469 ) + ( 85 + 115 ) = 590 + 200 = 790

Answer 7

*168+2080+32

=(168+32)+2080

=200+2080

=2280

*87+94+13+6

=(87+13)+(94+6)

=100+100

=200

*121+85+115+469

=(121+469)+(85+115)

=590+200

=790

Answer 8

168 + 2080 + 32 = (168 + 32) + 2080 = 200 + 2080 = 2280

87 + 13 + 94 + 6 = (87 + 13) + (94 +6) = 100 + 100 = 200

121 + 85 + 115 + 469 = (121 + 469) + (85 + 115) = 590 + 200 = 790

Answer 9

1.(168 + 32) + 2080         

= 200 + 2080

= 2280

2.(87 + 13) + (94 + 6)

= 100 + 100

= 200

3.(121 +469) + (85 + 115)

= 590 + 200

= 790

Answer 10

1,/ 168 + 2080 + 32

=  (168 + 32) + 2080

=    200 + 2080

=    2280

2,/ 87+ 94 + 13 +6

= (87 + 13) + ( 94 + 6)

=  100  +  100

= 200

3,/ 121 + 85 + 115 + 469

= ( 121 + 469) + ( 85 + 115 )

=       590        +       200

=           790

k cho mình nha . CHÚC BẠN HỌC GIỎI ^-^ !!!!!!

Answer 11

168+2080+32=(168+32)+2080

=200+2080=2280

87+94+13+6=(87+13)+(94+6)

=100+100=200
121+85+115+469=(121+469)+(85+115)

=590+200=790

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