问题
解答题
①6.81+6.81×99
②0.25×185×40
③3.94+34.3×0.2
④3.6÷0.4-1.5×3
⑤2.08×(9.6÷2.4)÷4.8
⑥68.1-77.7÷0.7×0.5.
答案
①6.81+6.81×99,
=6.81×(1+99),
=6.81×100,
=681;
②0.25×185×40,
=0.25×40×185,
=10×185,
=1850;
③3.94+34.3×0.2,
=3.94+6.86,
=10.8;
④3.6÷0.4-1.5×3,
=9-4.5,
=4.5;
⑤2.08×(9.6÷2.4)÷4.8,
=2.08×4÷4.8,
=8.32÷4.8,
=1.7
;• 3
⑥68.1-77.7÷0.7×0.5,
=68.1-111×0.5,
=68.1-55.5,
=12.6.