笔算下列各题
7.8乘以11与89的和,再减去609,差是多少?
直接写出得数. 0.44+++0.6 +2×2﹣2÷(4﹣2)÷(1+2.4) 48200﹣156×720÷39(3.06÷0.25+2.76)×0.2[3÷(3﹣2.4×)]×0.2.
0.38×7﹣+4×.
计算: (1)208×145﹣24990÷238 (2)10﹣1×3﹣1÷1 (3)(2.76÷0.3﹣4)×(0.25+) (4)[3﹣(0.2+)×4.5]÷2 (5)(15.4﹣6×)÷(2+)
简算 (1)12.96﹣7.31﹣2.69 (2)59.6×3+6.625×59 (3)12.5×2.5×4×0.8 (4)(++)×24.