脱式计算，能用简便方法要用简算．
2001×
349×101﹣349 37×9.25+37×
306×35﹣4080÷24 9
﹣6
﹣1
6.8×16.8+19.3×3.2．
脱式计算，能用简便方法要用简算．
2001× 349×101﹣349 37×9.25+37×
306×35﹣4080÷24 9﹣6﹣1 6.8×16.8+19.3×3.2．
．
= × =
=
．
×2= 
×
= 
=
= 
×
= 1×
=
×0= 3×
= 
×
=
×12= 
×
=
= 
×
=
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