整理一批图书，李老师单独整理要20分钟，小华单独整理要30分钟。现李老师和小华共同整理，要几分钟完成？完成时李老师比小华多整理96本，这批图书一共多少本？
直接写出得数：×2=÷=+= 4×（+）= 1÷37.5%= 5÷5÷= 32﹣32×=（ ﹣）×20=
直接写出计算结果．== 8×= 12=== 2﹣= 1=
直接写出得数． 3×=÷0.5= 9÷=÷﹣= （1﹣）÷= 2÷×=
直接写得数．×6= 30×=÷= 20÷=+=××0=×= 1÷×= 5.6÷0.08= 39××=
直接写得数．﹣=÷=×=×= 10×=×=÷=÷= 15×=÷=+=÷22=
×2=
÷
=
+
=
+
）= 1÷37.5%= 5÷5÷
=
=（ 
﹣
）×20=
=
= 8×
= 12
=
=
= 2﹣
= 1
=
=
÷0.5=
=
÷
﹣
）÷
×
=
×6= 30×
=
÷
= 20÷
=
+
=
×
×0=
×
= 1÷
=
×
=
﹣
=
÷
=
×
=
×
= 10×
=
×
=
÷
=
÷
= 15×
=
÷
=
+
=
÷22=
粤公网安备 44130202000953号