计算下面各题，并且验算：41.2﹣15.6 21.56+6.74．
直接写出得数．÷6= 15÷=×=÷= 42×=﹣60%= 10﹣99%= 40%×=
直接写出得数． 24×= 1÷=×12=×18÷3=÷=（﹣）×=×÷×=
直接写得数．============
直接写得数．×=×12=×=÷=÷= 9×=÷═÷12=
直接写得数．=== 3.2÷40%=====
÷6= 15÷
=
×
=
÷
= 42×
=
﹣60%=
=
= 1÷
=
×12=
×18÷3=
÷
=（
﹣
）×
=
×
÷
=
=
=
=
=
=
=
=
=
=
=
=
×
=
×12=
×
=
÷
=
÷
= 9×
=
÷
═
÷12=
=
=
=
=
=
=
=
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