能简算的要简算．2.87+5.6﹣0.87+4.4 ×9﹣×6 420÷7÷6﹣（ +）÷1999+999×999．
直接计算0.8．
直接写出得数÷3=×15= 2﹣= 36+48=×75%=×4×= 298+405≈×99+99×=
直接写出得数．×=÷=÷= 1.8÷= 0.2÷3=÷=×=××0=×÷×= 18÷÷=
你能直接写出下列各题的结果吗？试试看×=÷=××= 4.5%=×12=÷4= （+）×== %
计算．×÷÷××÷6×÷7÷．
×9﹣
﹣（ 
+
）÷
0.8
．
÷3=
×15= 2﹣
=
×75%=
×4×
=
×99+99×
×
=
÷
=
÷
= 1.8÷
= 0.2÷3=
÷
=
×
=
×
×0=
×
÷
×
÷
=
×
=
÷
×
×
= 
×12=
÷4= 
+
）×
=
= %
×
÷
÷
×
×
÷6×
÷7÷
．
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