作业帮这道简算题怎么做 9.9×7.23＋0.723 84.3×10.2.怎么做啊.请告诉我.谢谢,拜托了
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/02 20:34:43
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这道简算题怎么做 9.9×7.23＋0.723 84.3×10.2.怎么做啊.请告诉我.谢谢,拜托了
这道简算题怎么做 9.9×7.23＋0.723 84.3×10.2.怎么做啊.请告诉我.谢谢,拜托了
这道简算题怎么做 9.9×7.23＋0.723 84.3×10.2.怎么做啊.请告诉我.谢谢,拜托了
=9.9*7.23+0.1*7.23=7.23*（9.9+0.1）=72.3
84.3*10.2=84.3*10+84.3*0.2
9.9×7.23＋0.723 可得9.9×7.23＋0.1×7.23即（9.9+0.1）×7.23即得72.3
84.3×10.2可得84.3×(10+0.2)即84.3×10+84.3+0.2可得843+16.86即为859.86
9.9×7.23＋0.723
=99*0.723+0.723
=(99+1)*0.723=723
84.3×10.2
=84.3(10+0.2)
=843+16.86
=859.86
9.9*7.23+0.723
=9.9*7.23+0.1*7.23
=(9.9+0.1)*7.23
=10*7.23
=72.3
得数为72.3
84.3*10.2
=84.3*(10+0.2)
=84.3*10+84.3*0.2
=843+16.86
=859.86
得数为859.86