参加写作班的同学有多少名?
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列式:
261﹣99= 17÷34= 2.1+0.79= 80×125%=
÷36= 38.38÷38= +×0= ×3÷×3=
0.56÷0.8= = = =
5×( )= 30×= 0.53= 3﹣=