uk+win+49

谷素歪209150*47+49*47+47怎么用运算定律计算 -
闻阅询18943113184 ______[答案] 50*47+49*47+47 =50*47+49*47+1*47 =(50+49+1)*47 =100*47 =4700

谷素歪20911/2+1/2*1/3+1/3*1/4+1/4*1/5+.1/49*1/50=? -
闻阅询18943113184 ______[答案] 1/2*1/3=1/2-1/3 以此类推 原式可化为1/2+1/2-1/3+1/3-1/4+++.+1/49-1/50 =1-1/50=49/50

谷素歪20911+2+3+4+5+6+.49结果是多少? -
闻阅询18943113184 ______[答案] 1+49+2+48+...+24+26+25=24*50+25=1225

谷素歪209155*[(79+49)÷8]的简便运算怎么写 -
闻阅询18943113184 ______ 55*[(79+49)÷8]的简便运算=55x(128÷8)=55x16=55x2x8=110x8=880

谷素歪20911+2+3+4+5+6+7+8+9+……+49=?有没有简单的计算办法? -
闻阅询18943113184 ______[答案] (1+49)*49/2=1225 等差数列公式(首项+末项)*项数/2

谷素歪209142*51+49 *3简便运算 -
闻阅询18943113184 ______ 简便运算42*51+49 *42=42*(51+49)=42*100=4200

谷素歪209116+49+78+35的简便方法是什么 -
闻阅询18943113184 ______[答案] 16+49+78+35 =65+78+35 =65+35+78 =100+78 =178

谷素歪2091简算可以吗?(48+四十九分之四十八)÷24 -
闻阅询18943113184 ______[答案] (48+49分之48)÷24 =(48+49分之48)*24分之1 =48*24分之1+49分之48*24分之1 =2+49分之2 =2又49分之2

谷素歪2091计算:1/2+(1/2+1/3)+(1/4+2/4+3/4)+.(1/50+2/50+3/50+.+48/50+49/50) -
闻阅询18943113184 ______[答案] 1/2+(1/3+2/3)+(1/4+2/4+3/4)+.(1/50+2/50+3/50+.+48/50+49/50) =1/2+2/2+3/2+……+49/2 =1/2*(1+2+3+……+49) =1/2*(1+49)*49÷2 =612.5

谷素歪2091the+形容词或名词The British and (the Russians) wanted to build it.The British是the+形容词表英国人,那the Russians是什么,既然加s了,那肯定是名词,可... -
闻阅询18943113184 ______[答案] 我只听过the+形容词构成名词,表示一类人!