Question

Bỏ ngoặc rồi tính:
a) ( 1321 - 287) - (1281 + 183 )

b) ( 17 - 235 ) + ( -235 -17 + (-68)

Answer 1

\(a,=1321-287-1281-183\\ =\left(1321-1281\right)+\left(-287-183\right)\\ =40-470=-430\)

\(b,=17-235-235-17-68\\ =\left(17-17\right)+\left(-235-235\right)-68\\ =0-470-68=-538\)

 

 

 

Answer 2

a, (1321 - 287) - (1281 + 183)

  =1321 - 287 -1281 - 183

  = -430

b, 

  =17 - 235 - 235 -17 - 68

  =-68