相关试题
﹣
=
+
= 420÷5= 
=
+
=
= 18﹣18÷9=口算．
132÷4= 3.8﹣1.4= 525+175= 10.7+1.3=
40×50= 
= 1﹣
= 515÷5=
84÷4= 
= 0.7﹣0.5+0.2= 12+8×30=
口算．
132÷4= 3.8﹣1.4= 525+175= 10.7+1.3=
40×50= = 1﹣= 515÷5=
84÷4= = 0.7﹣0.5+0.2= 12+8×30=
= 
= 
= 81×9≈
+
= 30×23= 630÷3= 480÷2=
﹣
= 50×80=
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