Question

Bài 4:Bỏ dấu ngoặc rồi tính
a, (3965 - 2378) - (437 -1378) - 528
b, (-457) + (-123) + 23 + 237
c, (-329) - (15 - 101) - (25 - 440)

Answer 1

a: \(\left(3965-2378\right)-\left(437-1378\right)-528\)

\(=3965-2378-437+1378-528\)

\(=\left(3965-437-528\right)-\left(2378-1378\right)\)

\(=3000-1000=2000\)

b: \(\left(-457\right)+\left(-123\right)+23+237\)

\(=\left(-457+237\right)+\left(-123+23\right)\)

\(=-220-100=-320\)

c: \(\left(-329\right)-\left(15-101\right)-\left(25-440\right)\)

\(=-329-15+101-25+440\)

\(=\left(440-15-25\right)+\left(-329+101\right)\)

\(=400-228=172\)