第1个回答 2015-01-19
(1)12.5×8.94×0.8
=12.5×0.8×8.94
=10×8.94
=89.4;
(2)7.4×0.5+7.4÷0.5
=3.7+14.8
=18.5;
(3)6.8×32+32×3.2
=(6.8+3.2)×32
=10×32
=320;
(4)(8.1-5.6)÷0.8+7.75
=2.5÷0.8+7.75
=3.125+7.75
=10.875;
(5)5.6×(12.5-8.5÷0.85)
=5.6×(12.5-10)
=5.6×2.5
=14;
(6)3.5×[13-(3.12+5.28)]
=3.5×[13-8.4]
=3.5×4.6
=16.1.本回答被提问者采纳