125+126+127+128+129=( )*( )等于多少乘以多少?
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125+126+127+128+129=( )*( )等于多少乘以多少?
125+126+127+128+129=( )*( )
等于多少乘以多少?
125+126+127+128+129=( )*( )等于多少乘以多少?
这是一个等差数列,公差为1.等差数列的性质决定等差数列的中间项的两倍等于以它为对称轴的前后两项的和,这就是等差中项定理.如题,127×2=126+128,127×2=125+129.所以上面的五个数相加就等价于127×2+127+127×2=127×5.
125+126+127+128+129=(127 )*(5 )
总项数为奇数的等差数列之和是中间项的倍数.
125+126+127+128+129=(127-2)+(127-1)+127+(127+1)+(127+2)=127*5=635
127x5
题目不清楚啊,等式成立的条件太多 了
还可以是1和635
还有小数的,多了多了,题目描述不清楚
635
125+126+127+128+129=( )*( )等于多少乘以多少?
125+126+127+128+129+124+123+122+121+120=
124+125+126+127+128+129+130=多少乘以多少?找出规律,改写成乘法算式.
129+126+123+125+124+128+127+122+124+123的简便运算
125加126才127加128加129加200等于多少,除以89
125+126+127+128+.+221+222+223=?
119+123+126+129+128+132+134+135+133+131+125+127+131+136+124+131+129+126+126+130=
119,123,126,129,128,132,134,135,141,133,131,125,127,131,136,137,124,131,129,126,130 他们的中位数是多少 众数是多少
1,4,8,11,27,30,64,67,125,( )A.126 B.127 C.128 D.129
119,123,126,129,128,132,134,135,141,133,131,125,127,131,136,137,124,131,129,130的众数
125+126+127+128+.+221+222+223=?请说明做题步骤
124,125,126,127,128哪个不是八进制数字
125+125+125+126+126+126+127+127+127
128乘以126/127
简便计算:129*127/128+127*129/128
简便算式 130+129+128+127+.+2+1=
124+125+126+127+129+130=﹙ ﹚×﹙ ﹚
2,7,28,63,( ),215A.125 B.126 C.127 D.128选哪个?