21.1+21.2+213+21.4+21.5+.21.9
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21.1+21.2+213+21.4+21.5+.21.921.1+21.2+213+21.4+21.5+.21.921.1+21.2+213+21.4+21.5+.21.921.1+21.2+21.
21.1+21.2+213+21.4+21.5+.21.9
21.1+21.2+213+21.4+21.5+.21.9
21.1+21.2+213+21.4+21.5+.21.9
21.1+21.2+21.3+21.4+21.5+.21.9
=(21.1+21.9)×9÷2
=193.5
21.1+21.2+21.3+21.4+21.5+......21.9
=21*9+(0.1+0.2......+0.9)
=189+(0.1+0.9)*5-0.5
=193.5
答案是:-101775.93 -101783.93 -101775.93
(21.1+21.9)*9/2=193.5
第一个与倒数第一个相加,第二个与倒数第二个相加,以此类推,最后共有4个43和一个21.5,因此原式=4*43+21.5=193.5
原式=(21.1+21.9)+(21.2+21.8)+......(21.4+21.6)+21.5
=43+43+43+43+21.5
=132+21.5
=153.5
中间怎么突然出来个213,是不是打错了
21.1+21.2+213+21.4+21.5+.21.9
(21.2×6.9+21.2×3+6.9×3)×2=?
英语翻译21.1 This Supply Contract,its Appendices(附属),drawings as well as other documents concerning to this Contract are made in English in 2 originals of equal validity,1 of which for the Seller and 1 for the Buyer.21.2 Any alterations and a
(3/214-2/213)*214*213 妙算
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213*2+426*5-639*4=?*(2+?)=?
写出除213后余3的全部2位数
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213是什么意思?
213是什么意思?
213是什么意思?