(9999+9997+···+9001)—(1+3+5+····+999)=?
(9999+9997+···+9001)—(1+3+5+····+999)=?
(1+3+5+···+997+999)—(2+4+6+···+998+1000)
1+2++3+··········+10000=
关联词 就算······( )······
根号下9999····9乘以9999···999+199999··99(都是N个9)结果是多少?
(1)用像······似的······造个句子 (2)用像······一样······造一个句子
(20平方+18平方+16平方+······+2平方)—(1平方+3平方+5平方+······19平方)
用简便方法计算(2+4+6+8······+2014)—(1+3+5+7······+2013)
巧算(1+3+5+7······+995+997+999)-(2+4+6+8+10·····992+994+996+99
数学题1*2分之一+2*3分之一+3*4分之一+···············+99*100分之一=( )
1,3,7,15,(),63,()·········找规律
32÷6=5······2 16÷3=5······1 被除数,除数,商,余数有什么变化?(用一句话表示)