我能算得又对又快．
1﹣
= 45÷9= 900×2= 
= 340﹣70=
40×5= 37×0= 9×9﹣1= 60÷7= 701×5=
3200﹣200= 6×8+8= 1800×3= 63÷9= 0×9+8=
49×9≈ 404×4≈ 301×5≈ 0×2÷62= 4+6×9=
我能算得又对又快．
1﹣= 45÷9= 900×2= = 340﹣70=
40×5= 37×0= 9×9﹣1= 60÷7= 701×5=
3200﹣200= 6×8+8= 1800×3= 63÷9= 0×9+8=
49×9≈ 404×4≈ 301×5≈ 0×2÷62= 4+6×9=
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