列竖式计算下面各题,带△号的要验算.12.7+6.9= 20.5﹣7.6= 78×69=434÷7= 906÷3= △843÷6=验算:
计算下面各题,能简算的必须简算.9.5×1.06﹣2.52÷2.4 6.25÷1.25÷0.8 2.5×(3.5﹣1.65)×0.4 27.2÷(3.2+23×0.6) 68.5+31.5÷(0.29+0.41) 3.82×(2.8﹣1.3)﹣1.82×1.5.
计算,能简算的要简算.49.2÷(4.3×2﹣0.4) 9 ().
计算下列各题.(能简算的要简算)3.8﹣1.9+7.2﹣8.1()÷÷15=40﹣(7.7+4.8÷1.2)()×13×29=
递等式计算(能简算的要简算).(1)92.3﹣55.51+4.49(2)6.52+1.43+8.57+3.48(3)75.8﹣13.57﹣1.43(4)39×89+39×12﹣39(5)5208÷(31×56)(6)(2657+35×26)÷29.
(1)5.1÷0.17÷3(2)1.25×1.05﹣0.05×1.25(3)8÷[(40.75﹣9.5)×0.4](4)1.75×3.75÷0.175(5)1.12×1.8+2.24×0.1.