口算．240÷60= 360﹣60= 560÷70= 8×6÷8×6=90÷18= 6×15= 800÷80= 312﹣55﹣45=
直接写出得数﹣=+= 24×= 36÷= 0.27÷0.56= 0.125×8= 0.63÷9= 0.32=
直接计算×4=÷4= 8÷= 8×=÷= 39÷=
直接写得数．×0=×=×12=×=÷=÷= 9×=×= 18×=÷=÷=÷12=
计算×÷÷．
直接写出得数．÷5=÷4=÷2=÷3=÷=÷=÷=÷= 1÷= 15÷=÷=÷=×=×=+= 1﹣=
﹣
=
+
= 24×
= 36÷
=
×4=
÷4= 8÷
= 8×
= 39÷
×0=
×
=
×12=
×
=
÷
=
÷
= 9×
=
×
= 18×
=
÷
=
÷
=
÷12=
×
÷
÷
．
÷5=
÷4=
÷2=
÷3=
÷
=
÷
=
÷
÷
=
= 15÷
=
÷
=
÷
=
×
×
=
+
= 1﹣
=
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