Question

Tính: 50 + 49 – 48 + 47 – 46 + 45 – 44 + 43 – 42 + 41 – 40 = 

Answer 1

\(50+49-48+47-46+45-44+43-42+41-40\)

\(=50+\left(49-48\right)+\left(47-46\right)+\left(45-44\right)+\left(43-42\right)+\left(41-40\right)\)

\(=50+1+1+1+1+1\)

\(=50+\left(1.5\right)\)

\(=50+5\)

\(=55\)

Answer 2

dap an la 135 ban h cho minh nha

Answer 3

135 ket bn va tk nha

Answer 4

Làm thử nhóm xem sao

\(=\left(50-40\right)+\left(49+41\right)-\left(48+42\right)+\left(47+43\right)-\left(46+44\right)\)\(+45\)

\(=10+90-90+90-90+45\)

\(=10+45\)

 \(=55\)

Bài này chú ý dấu b nhé

Answer 5

50+49-48+47-46+45-44+43-42+41-40=135

Answer 6

Ra 135 sai rồi 2 bạn kia ơi. Tính lại đi

Answer 7

55 ket bn va tk nha mk nham

Answer 8

135 ban nhé

Answer 9

50 + 49 - 48 + 47 - 46 + 45 - 44 + 43 - 42 + 41 - 40 = 55

Answer 10

=[50-40]+[49+41]-[48+42]+[47+43]-[46+44]+45

=10+90-90+90-+90-90+45

=10+45

=55