27÷3= 530+170= 0×180= 32÷8×25=64+85= 60×8= 450+230= 206+194﹣340=360﹣300= 49÷7= 820﹣120= 150﹣60+40=150×4= 420+90= 54÷9= 125×8﹣1000= ﹣360=360 680+ =800 ×4=200.
用简便方法计算 8.16+5.49+2.84+4.51 1.29+3.7+2.71+6.3 12.98﹣(6.37+3.98) 36.9﹣10.47+3.1﹣10.53.
用简便方法计算下面各题. 18.5×30 34.5﹣8.9﹣9.9﹣10.9 (8﹣0.8)×125 3.5×1.02+35×0.098.
68×34+68×67﹣68.
26×49+26.
用简便方法计算:24.6×4.6+246×0.44+24.6.