直接写出结果568﹣198= 0.65÷1.3= 4.5×102= 5﹣0.25+0.75= 3.7×99+3.7=0.4÷40%= 600÷25÷8= 1.2= = 5﹣5÷6=30%+6.5= 5÷21×7= = = ==
能简算的要简算: (1)241×690÷339÷345×678÷241(2)6﹣0.65+5×99 (3)356×84﹣4×356﹣80÷(4)[3.75﹣(0.2+)×4]÷13.5%
999×222+333×334.
计算(能用简便运算的要简便运算). ①1.43×60%﹣0.6×0.43②×14③0.125+﹣(﹣) ④﹣(0.75+)⑤99.8÷12.5÷24⑥[1﹣(75%+)]÷0.25.
8×2.7+6.2×1.4+3.5×8.6.
(1)×(+)(2)101×2.85﹣2.85(3)÷[(+)÷].