用简便算法56.9x42+5.69x570+56.9=?56.9x42+5.69x570+56.9=?用简便算法
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 15:41:35
![用简便算法56.9x42+5.69x570+56.9=?56.9x42+5.69x570+56.9=?用简便算法](/uploads/image/z/747797-5-7.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%9556.9x42%2B5.69x570%2B56.9%3D%3F56.9x42%2B5.69x570%2B56.9%3D%3F%E7%94%A8%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95)
用简便算法56.9x42+5.69x570+56.9=?56.9x42+5.69x570+56.9=?用简便算法
用简便算法56.9x42+5.69x570+56.9=?
56.9x42+5.69x570+56.9=?用简便算法
用简便算法56.9x42+5.69x570+56.9=?56.9x42+5.69x570+56.9=?用简便算法
56.9x42+5.69x570+56.9
=56.9x42+56.9x57+56.9x1
=56.9x(42+57+1)
=56.9x100
=5690
原式 =56.9x42 + 5.69×10x570÷10 + 56.9
=56.9×42 + 56.9×57 + 56.9
提取公因式 56.9
原式=56.9(42+57+1)
=56.9(100)
=5690