口算下列各题．
69÷3= 30×600= 370﹣50= 0÷387= 505÷5=
13×20= 50×21= 240÷3= 420÷2= 2000÷5=
800×4= 194÷6≈ 440÷9≈ 72×19≈ 38×59≈
口算下列各题．
69÷3= 30×600= 370﹣50= 0÷387= 505÷5=
13×20= 50×21= 240÷3= 420÷2= 2000÷5=
800×4= 194÷6≈ 440÷9≈ 72×19≈ 38×59≈
×16= 12÷
= 0.3×
=
×
÷
÷
= 0×
+
=
×
÷
×
= 1.5÷
=
×0.8=
×9= 1.2÷
=
÷2=
÷
= 2.4÷
= 1÷5
=
÷3=
是
，这个数是多少？
除
的和，商是多少？
=
= 0.9﹣
=
=
=
=
= 72×
= 12÷
=
÷3= 3÷
=
= 1﹣
÷
=
×
÷
粤公网安备 44130202000953号