丁丁和玲玲两人摘苹果，丁丁说：“把我摘的苹果给玲玲7个，玲玲摘的苹果的个数就是我的2倍．”玲玲说：“把我摘的苹果给丁丁7个，他的苹果个数就和我的一样多了．”问丁丁和玲玲各摘了多少个苹果？
简算．
直接写出得数． 1﹣= = = 23= 52= x•x•x== a×8×b= = = = 4×3×25=
计算下面各题．+1﹣+．
直接写出得数.= 1﹣40%= = 52= 1÷= =3﹣= = = = 0.8×÷=
看谁算得快．= 1﹣= = == 1﹣= = =1﹣= = = 1﹣=
．
= 
= 
= 23= 52= x•x•x=
= a×8×b= 
= 
= 
= 4×3×25=
+
+
．
= 1﹣40%= 
= 52= 1÷
= 
=
= 
= 
= 
= 0.8×
÷
=
= 1﹣
= 
= 
=
= 1﹣
= 
= 
=
= 
= 
= 1﹣
=
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