Question

Bài 1:Bỏ ngoặc rồi tính:

a/ (15+37)+(52-37-17)

b/(38-42+14)-(38-42-15)

Answer 1

a/(15+37)+(52-37-17)=15+37+52-37-17=50

b/(38-42+14)-(38-42-15)=38-42+14-38+42+15=29

Answer 2

15 + 37 + 52 - 37 - 17
= 15 + 37 - 37 + 52 - 17
= 15 + 0 + 52 - 17
= 67 - 17
= 50

b) 38 - 42 + 14 - 38 + 42 + 15
= 38 -38 + 42 - 42 + 14 + 15
= 0 + 0 + 14 + 15
= 29