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当前搜索:
索尼x99和x9
478
x9.9
47.8怎样简算
答:
=47.8
x99
+47.8 =47.8x(99+1)=47.8x100 =4780
2.34
x9.9
+0.234
答:
2.34
x9.9
+0.234 =2.34x9.9+2.34x0.1 =2.34x(9.9+0.1)=2.34x10 =23.4
0.0234十0.234
x9.9
答:
0.0234十0.234
x9.9
=0.0234+0.0234
x99
=0.0234x(1+99)=0.0234x100 =2.34
1999+999
x99
9
答:
19
99
+999*999 =1000+999+999*999 =1000+999*(999+1)=1000*(999+1)=1000000 999*99*9 =(1000-1)*(100-1)*9 =1000*(100*
9-9
)-(100*9-9)=891000-891 =890109
72.6
x9.9
+7.26怎么做?
答:
7.26*(
99
+1)=726
2a=3,2b=5,2c=60,求3ax3b
x99
-c/2
答:
3的16次方
38
x9.9
十3.8简算
答:
38
x99
+O-38
4.12十41.2
x9.9
简便计算
答:
原式 =4.12x1+4.12
x99
=4.12x(1+99)=4.12x100 =412 供参考。
棣栭〉
<涓婁竴椤
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