Question

Bỏ dấu ngoặc rồi tính:

a) (29 + 37 + 13) + (10 - 37 - 13)

b) (79 + 32 - 35) - (69 + 12 - 75)

Answer 1

a) = 29 +37 + 13 +10 - 37 - 13

= 39

b) 79 +32 - 35 - 69 - 12 +75

= 70

Answer 2

a) 29+37+13+10-37-13

=(37-37)+(13-13)+29+10

=0+0+29+10

=39

Answer 3

a) (29 + 37 + 13) + (10 - 37 - 13)

= 29 + 37 + 13 + 10 - 37 - 13

= 39

b) (79 + 32 - 35) - (69 + 12 - 75)

= 79 + 32 - 35 - 69 - 12 + 75

= 70

Answer 4

\(\text{a) (29 + 37 + 13) + (10 - 37 - 13)}\\ 29+37+13+10-37-13\\ =29+10\\ =39\\\)

\(\text{b) (79 + 32 - 35) - (69 + 12 - 75)}\\ =79+32-35-69-12+75\\ =10+20-40\\ =30-40\\ =-10\)

Answer 5

b) 79+32-35-69-12+75

=(79-69)+(32-12)+(-35+75)

=10+20+40=70

Answer 6

a) (29 + 37 +13) + (10 - 37 - 13)

= 29 + 37 + 13 + 10 - 37 - 13

= (13 -13) + (37 - 37) + 29 + 10

= 0 + 0 + 29 + 10 

= 39

b) (79 + 32 - 35) - (69 + 12 - 75)

= 79 + 32 - 35 - 69 + 12 - 75

= -56 :v

Sai thì sr :v