问题
解答题
①12.5×3.7×0.8
②4.6×2.3+7.7×4.6
③3.6+（5.7+3.8）÷0.5
④3.6÷0.4-1.5×3
⑤0.1÷0.2÷0.4
⑥80.3-5.6×1.7．
答案
①12.5×3.7×0.8
=12.5×0.8×3.7，
=10×3.7，
=37；
②4.6×2.3+7.7×4.6．
=（2.3+7.7）×4.6，
=10×4.6，
=46；
③3.6+（5.7+3.8）÷0.5
=3.6+9.5÷0.5，
=3.6+19，
=22.6；
④3.6÷0.4-1.5×3
=9-4.5，
=4.5；
⑤0.1÷0.2÷0.4
=0.5÷0.4，
=1.25；
⑥80.3-5.6×1.7，
=80.3-9.52，
=70.78．