chỉ cần tính thôi hay gì k ạ
1 , 66
2, 28
3, 450
4,111
5, 422
còn trình bày cách làm nha
\(1,\)\(5+22+37+2\)
\(=\)\(27+37+2\)
\(=\)\(64+2\)
\(=\)\(66\)
\(2,\)\(12-6+26-4\)
\(=\)\(6+26-4\)
\(=\)\(32-4\)
\(=\)\(28\)
\(3,\)\(\left(2016+450\right)-2016\)
\(=\)\(2016-2016+450\)
\(=\)\(0+450\)
\(=\)\(450\)
\(4,\)\(364-\left(364-111\right)\)
\(=\)\(364-364+111\)
\(=\)\(0+111\)
\(=\)\(111\)
\(5,\)\(1972-\left(638+972\right)\)
\(=\)\(1972-638-972\)
\(=\)\(\left(1972-972\right)-638\)
\(=\)\(1000-638\)
\(=\)\(362\)