7.8×5.6 2.3 ×4.4用简便方法怎么做
答案:1 悬赏:10 手机版
解决时间 2021-03-04 03:26
- 提问者网友:听门外雪花风
- 2021-03-03 22:00
7.8×5.6 2.3 ×4.4用简便方法怎么做
最佳答案
- 五星知识达人网友:孤独的牧羊人
- 2021-03-03 22:41
7.8×5.6+2.3 ×4.4
=5.5××5.6+2.3×5.6+2.3 ×4.4
=30.8+2.3×(5.6+4.4)
=30.8+2.3×10
=30.8+23
=53.8
=5.5××5.6+2.3×5.6+2.3 ×4.4
=30.8+2.3×(5.6+4.4)
=30.8+2.3×10
=30.8+23
=53.8
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