4.7×5.9+5.2×5.2怎么简便计算
答案:1 悬赏:50 手机版
解决时间 2021-02-20 06:12
- 提问者网友:城市野鹿
- 2021-02-19 10:19
4.7×5.9+5.2×5.2怎么简便计算
最佳答案
- 五星知识达人网友:何以畏孤独
- 2021-02-19 10:26
4.7×5.9+5.2×5.2
=4.7×(5.2+0.7)+5.2×5.2
=4.7×5.2+4.7×0.7+5.2×5.2
=(4.7+5.2)×5.2+4.7×0.7
=9.9×5.2+4.7×0.7
=(10-0.1)×5.2+4.7×0.7
=10×5.2-0.1×5.2+4.7×0.7
=52-0.52+3.29
=54.77
=4.7×(5.2+0.7)+5.2×5.2
=4.7×5.2+4.7×0.7+5.2×5.2
=(4.7+5.2)×5.2+4.7×0.7
=9.9×5.2+4.7×0.7
=(10-0.1)×5.2+4.7×0.7
=10×5.2-0.1×5.2+4.7×0.7
=52-0.52+3.29
=54.77
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