小学三年级数学接力赛12x4,()x3,()x6,() 上教版小学三年级数学应用题(问卷)
\u8bbeX\u670d\u4eceN\uff080,1\uff09\uff0c(X1\uff0cX2\uff0cX3\uff0cX4\uff0cX5\uff0cX6)\u4e3a\u6765\u81ea\u603b\u4f53X\u7684\u7b80\u5355\u968f\u673a\u6837\u672c\uff0c(X1\uff0cX2\uff0cX3\uff0cX4\uff0cX5\uff0cX6)\u4e3a\u6765\u81ea\u603b\u4f53X\u7684\u7b80\u5355\u968f\u673a\u6837\u672c
\u6240\u4ee5
(X1+X1+X3)~N(0,3)
(X4+X5+X6)~N(0,3)
\u6240\u4ee5
\u800c1/\u221a3(X1+X1+X3)~N(0,1);1/\u221a3(X4+X5+X6)~N(0,1)
\u5219[1/\u221a3(X1+X1+X3)]^2+[1/\u221a3(X4+X5+X6)]^2~X^2(2)
\u4e5f\u5c31\u662f\u8bf4c=1/3 cY~X^2(2)
\u4e09\u5e74\u7ea7\u5b66\u751f\u5178\u578b\u5bb9\u6613\u72af\u9519\u6216\u8005\u96be\u5ea6\u4e2d\u7b49\u504f\u4e0a\u7684\u9898\u76ee:4\u3001 5\u3001 6 \u30017\u3001 10 \u300111 \u300114 \u300119\u300122\u3001 25\u3001 26\u7b49\u9898\u3002
小学三年级数学接力赛12x4=(16 )x3=( 8 )x6=(48 )16x3 8x6 24x2
48x1
请采纳！
计算
12*4
=10*4+2*4
=48
16*3=48
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