Question

tính hợp lí :
a, 136 + ( - 36 ) + 100
b, ( -72) + ( - 208 ) + ( - 43 ) + ( - 102 )

Answer 1

`a)136+(-36)+100=136-36+100=(136-36)+100=100+100=200`

`b)(-72)+(-208)+(-43)+(-102)=-(72+43)-(208+102)=-115-310=-425`