Question

4.57×4.57×9如何简便运算？

Answer 1

4.57×4.57×9
=(4.6-0.03)²漏厅嫌×9
【展开完返手全平伏闭方式】
=(4.6²-9.2×0.03+0.03²)×9
=(4.6²-0.276+0.0009)×9
=[(4+0.6)²-0.2751]×9
=(16+4.8+0.36-0.2751)×9
=(21.16-0.2751)×9
=20.8849×9
=187.9641

Answer 2

4.57×4.57×9如何简便运算？
这道行差题目没有什山哗么特别简单逗带行的方法，最直接计算即可：
4.57×4.57×9
=4.57×4.57X9
=20.8849×9

=187.9641

Answer 3

=4.57×4.57X9=20.8849×（桐迅10-1）局茄此
=20.8849X10一纳铅20.8849
=208.849-20.8849=187.9641

Answer 4

原式棚好漏=（5-0.43）²*9
=（25+0.43²-4.3）*9
=（链烂20.7+（0.4+0.03）²）袜碧*9
=20.7*9+9*（0.16+0.0009+0.8*0.03）
=186.3+9*（0.1609+0.024）
=186.3+9*0.1849
=186.3+10*0.1849-0.1849
=186.3+1.849-0.1849
=188.149-0.1849
=188-0.0359
=187.9641

Answer 5

直接计算：蔽御简便计算没有更陵答卵简单尺并慧。
4.57x4.57x9
＝20.8849x9
＝187.9641