1.4+6.58-3.08
3.17-(4.46-1.54)
3.71-2.34+1.09
10-(1.38+2.75)
=7.98-3.08
=4.9
=3.17-2.92
=0.25
=1.37+1.09
=2.46
=10-4.13
=5.87
先说一说运算顺序,再计算。
先算加后算减
先算括号后算减
先算减后算加