a) = 29 +37 + 13 +10 - 37 - 13
= 39
b) 79 +32 - 35 - 69 - 12 +75
= 70
a) 29+37+13+10-37-13
=(37-37)+(13-13)+29+10
=0+0+29+10
=39
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
\(\text{a) (29 + 37 + 13) + (10 - 37 - 13)}\\ 29+37+13+10-37-13\\ =29+10\\ =39\\\)
\(\text{b) (79 + 32 - 35) - (69 + 12 - 75)}\\ =79+32-35-69-12+75\\ =10+20-40\\ =30-40\\ =-10\)
b) 79+32-35-69-12+75
=(79-69)+(32-12)+(-35+75)
=10+20+40=70
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
