有理数加减法的混合运算
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有理数加减法的混合运算
(1)26.5+(34.2-65.4+73.5)-58.6
(2)598-(-269+119-402)
(3)17/6+(2-7/6+3/2)
(4)18/7-(3/7+0.6-1)
(1)26.5+(34.2-65.4+73.5)-58.6
(2)598-(-269+119-402)
(3)17/6+(2-7/6+3/2)
(4)18/7-(3/7+0.6-1)
(1=26.5+73.5+34.2-65.4-58.6
=100+34.2-124
=10.2
(2=598+402+269-119
=1000+269-119
=1150
(3)=17/6-7/6+3/2+2
=10/6+9/6+2
=2又19/6
(4)=18/7-3/7-1+0.6
=8/7+3/5
=61/35
=100+34.2-124
=10.2
(2=598+402+269-119
=1000+269-119
=1150
(3)=17/6-7/6+3/2+2
=10/6+9/6+2
=2又19/6
(4)=18/7-3/7-1+0.6
=8/7+3/5
=61/35