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．
×3= 1÷
= 1﹣
﹣
×
= 3﹣4×
=
×12=
÷
=
+
= 1﹣
﹣
=
﹣
=
×3=
×
=
﹣0.25= 72×
=
÷
=
÷
= 36÷
=
÷
=
×16= 12÷
= 0.3×
=
÷
= 1÷
= 0×
=
=
=
= 0×
=
÷
×1.4=
×
=
×10= 30×0.05=
=
=
=
=
=
=
=
=
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