2,3,5,7,11,()8,10,14,18,()3,11,13,29,31,()
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2,3,5,7,11,()8,10,14,18,()3,11,13,29,31,()2,3,5,7,11,()8,10,14,18,()3,11,13,29,31,()2,3,5,7,11,()8,1
2,3,5,7,11,()8,10,14,18,()3,11,13,29,31,()
2,3,5,7,11,()
8,10,14,18,()
3,11,13,29,31,()
2,3,5,7,11,()8,10,14,18,()3,11,13,29,31,()
2,3,5,7,11,(13)
质数
8,10,14,18,(20)
作差 2 4 4 2
做商 2 1 0.5(等比)
3,11,13,29,31,(55)
4-1 9+2 16-3 25+4 36-5 49+6
2^2-1 3^2+2 4^2-3 5^2+4 6^2-5 7^2+6
13
22
63
2 3 5 7 11 13
8 10 14 18 26
3 11 13 29 31 53
13 都是素数
2,3,5,7,11,()8,10,14,18,()3,11,13,29,31,()
找规律 2 3/2 10/9 7/8 18/25 ( )5/14 11/18 13/27 26/49
(1)12 10 12 8 (2)4 10 7 6 (3)11 13 9 10 (4)5 7 3 11 (5)7 7 7 11 (6)12 2 8 1 (7)3 13 13 7 (8)11 6 7 4 (9)2 11 11 3 (10)13 12 1 9 (11)8 2 2 5 (12)12 5 6 8 (13)5 7 8 7 (14)8 2 3 5 (15)3 6 8 9
20个有理数的混合运算(要有过程)1) (-9)-(-13)+(-20)+(-2)(2) 3+13-(-7)/6(3) (-2)-8-14-13(4) (-7)*(-1)/7+8(5) (-11)*4-(-18)/18(6) 4+(-11)-1/(-3)(7) (-17)-6-16/(-18)(8) 5/7+(-1)-(-8)(9) (-1)*(-1)+15+1(10) 3-(-5)*3/(-15)(11) 6*(-14)-(-14)+
1 2 4 5 7 ()()2 4 8 14 22 () () 2 4 5 10 11()()3 8 7 12 11()()1 2 3 5 8 ()()2 8 5 20 7 28 11 ()()1 2 2 4 8()()
1+2+3+4+5+6+7+8+9+10+11+12+13+14+1000=?
2+3+5+6+7+8+10+11+12+13+14+15+...+99=?请回答
1-1/8÷3/8( )7/11÷14 ( )3/8*4/9( )1÷25 %( )9/7÷3( )10%*5*100%( )21*(2/3-1/7)=( ) 4-11/13÷11/13( )2/3*3/10÷2/3×3/10( )(急)
(3/5+7/8)*40 11/3-5/7*14/15 5/6/(4/7/9/14) (5/8-1/10)*(5/9+1/3) 1/5/(1-1/2-1/3)(3/4+1/2)/5/8 14/23*27-9/14/1/27 24*(3/4-7/12) (2/3-4/9*3/8)/7/16 20/5/9+3/8*4 谢谢你 拜托了 万分感谢啊
3/4*2 2/5*2简便计算还有7/11-8/7*5/8+5/14 (1/3*6/7-1/14)除以4/15
5/8+5/6=( ) 1/7+3/14=( ) 11/18-5/12= 4/9+11/21= 10/11-4/78/9-5/12 2/7+4/5 17/30-4/15帮帮忙
找规律 3,2,1,7,6,5,4,10,9,8,14,13,12,11()()()()()()()
7分之5*11分之6*7/10 3/4*(9/10-5/6) (1/5+1/9)*45 23/25*1/4+1/4*2/25 101*3/10-3/104/2/3*7/12 8/9/4/27+3/7 8/13/3/7+5/13/3/7 7/9*5/6/14/27 1/2*2/5+9/10/9/20 5/8*1/4/5/8*1/4 (1/2+2/3+3/4)*36
分数四则混合运算【用简便的方法做】(1)24x(11/12-7/8) (2)6-(3/7÷3/14+6/13) (3)1-5/8÷25/8-3/10
1*15+2*14+3*13+4*12+5*11+6*10+7*9+8*8怎样计算简便
1*15 2*14 3*13 4*12 5*11 6*10 7*9 8*8怎样计算简便
3个数列通项公式(基本)(1) 1,3,7,15,31.(2) 3,4,5,6,…- - - -5 8 11 14(3) 10,7,4,1,-2,-5,…第2题错了~是分数~3/5,4/8,5/11,6/14,…
(2)15(X-8)+12x+2 (3 ) 8(w+5)-5w-7 (4) 5+3b+4b-Y+3Y (5) 17(a-5)-4a+3 (6)12k-11k-0.5+14 (7) 3*4s-23+16s (8 )2h+3*6+7h*2 (9) 24-5v-(10v-5) (10) 6a-7b+3a-3b (11)s/2+56/7+7s (12) 6u-2(4v-3u) (13)8(a-a+10)+10 (14)5m+5m-(5n+5n) (15)14x-3(2x-1) (16) 4x