问题
解答题
按运算顺序计算
84-57+26
250+240÷24×5
124-172÷4
325÷5+86×3
34×(14+8)
(125-75)×12÷3
10-3.8-5.2
18.63+14.2-8.63.
答案
(1)84-57+26
=27+26
=53;
(2)250+240÷24×5
=250+10×5
=250+50
=300;
(3)124-172÷4
=124-43
=81;
(4)325÷5+86×3
=65+258
=323;
(5)34×(14+8)
=34×22
=748;
(6)(125-75)×12÷3
=50×12÷3
=600÷3
=200;
(7)10-3.8-5.2
=10-(3.8+5.2)
=10-9
=1;
(8)18.63+14.2-8.63
=18.63-8.63+14.2
=10+14.2
=24.2.