+
=
= 2.4÷
=
×
= 80×40%= 21÷
= 
﹣
×5= 
×18×
=相关试题
计算，能用简算的要简算．
0.85×101
5.29÷2.3﹣0.1×01
0.28÷35
8﹣4.68÷4.5×（0.25+0.5）
2.5×1.25×32
25.7×3.29+6.71×25.7．
÷
﹣
×
×
×40．计算下面各题（能简算的要简算）．
①4×0.8×2.5×12.5 ②
÷[1﹣（
+
）]③（2.8+3.85÷3.5）×4.6
④6.5×1.83+0.17×6.5⑤（
+
）×8+
⑥
÷[
×（0.4+
）]．
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