99与100的和乘它们俩的差是多少？
= = = 1= 1.2×= 1=6= = 3= 0.9﹣= 0.75+= 24×=
直接写出得数3×= ÷= 18÷= ××0=+= ×= ÷10= 1÷﹣÷1=
直接写得数．×= ×3= 0÷= ÷= ×=×39= ×= ÷= ÷= ÷3=
直接写数对又快！= = = == = = == =
直接写出得数10﹣0.1= += 1÷= 14﹣﹣=×= ﹣= ×= （+）×72=
= 
= 
= 1
= 1.2×
= 1
=
= 
= 3
= 0.9﹣
= 0.75+
= 24×
=
= 
÷
= 18÷
= 
×
×0=
+
= 
×
= 
÷10= 1÷
﹣
×
= 
×3= 0÷
= 
÷
= 
×
=
×39= 
×
= 
÷
= 
÷
= 
÷3=
= 
= 
= 
=
= 
= 
= 
=
= 
=
+
= 1÷
= 14﹣
﹣
=
×
= 
﹣
= 
×
= （
+
）×72=
粤公网安备 44130202000953号