计算.(1)55×66÷(11×11)(2)40.2-4÷80×2.4 (3)3.5×[6.8-(1.6+3.6÷0.9...
计算.(1)55×66÷(11×11)(2)40.2-4÷80×2.4(3)3.5×[6.8-(1.6+3.6÷0.9)]÷84(4)18×[12÷(35×109)](5...
计算.(1)55×66÷(11×11)(2)40.2-4÷80×2.4 (3)3.5×[6.8-(1.6+3.6÷0.9)]÷84(4)18×[12÷(35×109)](5)(12+14)÷(45÷4-110)
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(1)55×66÷(11×11),
=55×66÷11÷11,
=55÷11×(66÷11),
=5×6,
=30;
(2)40.2-4÷80×2.4,
=40.2-0.05×2.4,
=40.2-0.12,
=40.08;
(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)
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=55×66÷11÷11,
=55÷11×(66÷11),
=5×6,
=30;
(2)40.2-4÷80×2.4,
=40.2-0.05×2.4,
=40.2-0.12,
=40.08;
(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)
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