直接写结果﹣= 570÷×20=+3.5= 11﹣﹣=×= 1÷= 10﹣=÷= 19.9+19.9×99=
直接写出得数．﹣= 12×=÷26=+=×=+= 1÷=×=
口算﹣=+=×=÷7=
直接写出得数． （1）1﹣0.25=（2）+= （3）2﹣=（4）0.5×= （5）20%÷=（6）×30%= （7）×=（8）0÷=
直接写出得数：÷=÷3=××=×9×=÷2= 5÷﹣÷5= 2.7﹣= 6×= （1.6+3.2）×0.125= 1÷=÷10= 6×= 1﹣75%=÷=×= 5÷1%= 4÷=
﹣
= 570÷
×20=
﹣
=
×
= 1÷
= 10﹣
=
÷
= 19.9+19.9×99=
﹣
= 12×
=
÷26=
+
=
×
=
+
= 1÷
=
×
=
﹣
=
+
=
×
=
÷7=
+
=
=（4）0.5×
=
×30%=
×
=（8）0÷
=
÷
=
÷3=
×
×
=
×9×
÷2= 5÷
﹣
= 6×
=
=
÷10= 6×
=
÷
=
×
= 5÷1%=
=
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