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
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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](/uploads/image/z/3728855-47-5.jpg?t=%E8%BF%99%E9%81%93%E7%AE%80%E7%AE%97%E9%A2%98%E6%80%8E%E4%B9%88%E5%81%9A+9.9%C3%977.23%EF%BC%8B0.723+84.3%C3%9710.2.%E6%80%8E%E4%B9%88%E5%81%9A%E5%95%8A.%E8%AF%B7%E5%91%8A%E8%AF%89%E6%88%91.%E8%B0%A2%E8%B0%A2%2C%E6%8B%9C%E6%89%98%E4%BA%86)
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