计算.3.12÷1.2-1.2×0.6  
来源:学生作业帮 编辑:拍题作业网作业帮 分类:数学作业 时间:2024/05/01 07:46:48
计算. 3.12÷1.2-1.2×0.6 | 3000÷24+103×32 | 55×66÷(11×11) |
(1)3.12÷1.2-1.2×0.6
=2.6-0.72 =1.88; (2)3000÷24+103×32 =125+3296 =3421; (3)55×66÷(11×11) =55×66÷11÷11 =(55÷11)×(66÷11) =5×6 =30; (4) 11 3×12.5× 9 10×8 =( 11 3× 9 10)×(12.5×8) = 33 10×100 =330; (5) 5 8-( 1 2+ 3 5)× 5 11 = 5 8- 11 10× 5 11 = 5 8- 1 2 = 1 8; (6)123×5.67+8.77×567 =123×5.67+877×5.67 =(123+877)×5.67 =1000×5.67 =5670. |