5.8×9.9+5.8用简便方法计算
第1个回答 2018-04-12
5.8×9.9+5.8
=5.8×(9.9+1)
=5.8×10.1
=58.58
=5.8×(9.9+1)
=5.8×10.1
=58.58
第2个回答 2018-04-12
5.8×9.9+5.8
=5.8x（10-0.1）+5.8
=5.8x10-5.8x0.1+（6-0.2）
=58-0.58+6-0.2
=58+6-(0.58+0.2)
=64-0.78
=63.22
谢谢，请采纳
=5.8x（10-0.1）+5.8
=5.8x10-5.8x0.1+（6-0.2）
=58-0.58+6-0.2
=58+6-(0.58+0.2)
=64-0.78
=63.22
谢谢，请采纳
