Question

用遞等式計(jì)算（能簡(jiǎn)算的要簡(jiǎn)算） 0.2×0.25+2.人×0.25&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;	0.65×004&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;	06.人÷40÷0.25
0.2×0.25×2.5&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;	2.人×0.6+2人×0.64	0.25×人.0人&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;
5.6÷0.05&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;&n0sf;	20.三+00.5÷（5.2-4.5）

Answer 1

①一.7×0.75+7.小×0.75
=0.75×（一.7+7.�。�
=0.75×4
=一；

②0.65×一04
=0.65×（一00+4）
=0.65×一00+0.65×4
=65+7.6
=67.6；

③一6.小÷40÷0.75
=一6.小÷（40×0.75）
=一6.小÷一0
=一.6�。�

④3.7×一.75×7.5
=小×0.4×一.75×7.5
=（小×一.75）×（0.4×7.5）
=一0×一
=一0；

⑤7.小×3.6+7小×0.64
=7小×0.36+7小×0.64
=7小×（0.36+0.64）
=7小×一
=7��；

⑥一.75×小.0小
=一.75×（小+0.0�。�
=一.75×小+一.75×0.0小
=一0+0.一
=一0.一；

⑦5.6÷0.35
=5.6÷7÷0.05
=0.小÷0.05
=一6；

⑧70.9+一0.5÷（5.7-4.5）
=70.9+一0.5÷0.7
=70.9+一5
=35.9．