计算题:13.92-(1.19+9.92)-2.81;(25+16-215)×30;3.5×[6.8-(1.6+3.6÷0.9)]÷84;55×66÷(11×11);18×[12÷(35×109)];(12+14)÷(45÷4-110).-数学
题文
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答案
(1)13.92-(1.19+9.92)-2.81, =13.92-1.19-9.92-2.81, =(13.92-9.92)-(1.19+2.81), =4-4, =0; (2)(
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=12+5-4, =13; (3)3.5×[6.8-(1.6+3.6÷0.9)]÷84, =3.5×[6.8-(1.6+4)]÷84, =3.5×[6.8-5.6]÷84, =3.5×1.2÷84, =4.2÷84, =0.05; (4)55×66÷(11×11), =(55÷11)×(66÷11), =5×6, =30; (5)
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