Question

a) (67 - 5759) + 5759;

b) (-3023) – (765 - 3023);

c) 631 + [587 – (287 + 231)];

d) (-524) – [(476 + 245) - 45].

Giúp mình nha!!!!

Answer 1

\(d.\left(-524\right)-\left[\left(476+245\right)-45\right]\\ =-524-476-245+45\\ =\left(-524-476\right)-\left(245-45\right)\\ =-1000-200\\ =-1200\)

Answer 2

\(a.\left(67-5759\right)+5759\\ =67-5759+5759\\ =67+\left(5759-5759\right)\\ =67+0\\ =67\)

\(b.\left(-3023\right)-\left(765-3023\right)\\ =-3023-765+3023\\ =\left(-3023+3023\right)-765\\ =0-765\\ =-765\)

\(c.631+\left[587-\left(287+231\right)\right]\\ =631+587-287-231\\ =\left(631-231\right)+\left(587-287\right)\\ =400+300\\ =700\)

 

Answer 3

a.67                                                                      b.-765

c.700                                                                    d.-1200