口算，赢得小笑脸．
30×9= 700×7= 60×9=
400×7= 20×8= 400×5=
40×9= 300×5= 700×8=
40×4= 500×5= 40×8=
300×6= 80×3= 600×7=
500×6=
相关试题
口算，赢得小笑脸．
30×9= 700×7= 60×9=
400×7= 20×8= 400×5=
40×9= 300×5= 700×8=
40×4= 500×5= 40×8=
300×6= 80×3= 600×7=
500×6=
=
=
=
=
=
=
=
=
=
+40%=
﹣24%=
×
=
÷
=
+
=
×
=
= 1÷
﹣
=
×
×14= 1﹣
=
+
=
=
=
×
=
÷
= 0.25﹣
=
=
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