3/2*5+2/5*7+4/7*11+5/11*16+6/11*22+7/22*29+1/29
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3/2*5+2/5*7+4/7*11+5/11*16+6/11*22+7/22*29+1/293/2*5+2/5*7+4/7*11+5/11*16+6/11*22+7/22*29+1/293/2*5+
3/2*5+2/5*7+4/7*11+5/11*16+6/11*22+7/22*29+1/29
3/2*5+2/5*7+4/7*11+5/11*16+6/11*22+7/22*29+1/29
3/2*5+2/5*7+4/7*11+5/11*16+6/11*22+7/22*29+1/29
1/1 * 2 2/2 * 4 3/4 * 7 4/7 * 11 5/11 * 16 6/16 * 22 7/22 * 29 8/29 * 37 = 1-1/2 +1/2-1 / 4 +1/4-1 / 7 +1/7-1 / 11 +1/11-1 / 16 +1/16-1 / 22 + 1 / 22-1/29 +1/29-1 / 37
= 1-1/37
= 36/37
(6/5+9/11+1又5/7)/(3/11+2/5+4/7)简便计算
3/2*5+2/5*7+4/7*11+5/11*16+6/11*22+7/22*29+1/29
7/11-(2/5-4/11)简算
2,5,-7,11
5/[4-根号(11)]+1/[3+根号(7)]-6/[根号(7)-2]-[根号(7)-5]/2
简便运算 3/4-5/7-2/7+5/4 11X11X11-11X11-10
3/2*5+2/5*7+4/7*11+5/11*16+6/16*22+7/22*29
2/5*7+4/7*11+6/16*22+3/2*5+5/11*16+7/22*29+1/29
2+2+3+4+5+6+7+89+10-11
找出下面数字的规律 填空白处的数字7 7 2 5 7 5 3 5 7 4 7 3 7 4 7 5 5 3 7 5 7 3 7 7 7 5 5 3 5 7 5 4 4 7 5 7 7 5 7 5 4 7 5 3 7 __ 7 2 5 7 7 4 5 7 5 7 7 3 1 4 7 7 5 4 7 7 4 5 7 2 7 7 4 7 5 7 2 7 7 3 7 7 5 4 7 7 7 4 7 7 5 4 7 7 3 4 4 7 5 7
1+2+3+4+5+6+7+7+6+5+4+3+2+1+7+8+8+7+19+11
11/3×(5/7-2/5)-11/3×5/7+22/3×1/5是乘号
5/(2*3*4)+7/(3*4*5)+9/(4*5*6)+...+19/(9*10*11)
24点3则:11,11,1,5;8,5,2,7;1,4,5,6.
找规律,填算式,(1)1/5+2/5+3/5=2/5*3=6/5.(1)1/5+2/5+3/5=2/5*3=6/5 (2)1/7+2/7+3/7+4/7+5/7=3/7*5=15/7 (3)1/7+2/7+3/7+4/7+5/7+6/7+7/7=4/7*( )=( ) (4)1/11+2/11+3/11+4/11+5/11+6/11+7/11+8/11+9/11=( )*( )=( )
15/2×5/9+4/7+11/5×6/5
7/5+11/4+2/1=
3 2 5 4 7 ( )