5/6+3/8+25+16+2/7+2/5+2/7+3/8+4/9+2/7+2/9=?
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9,8,7,6 2,3,4,5 4,9,16,25 8,27,64,125
5/6+3/8+25+16+2/7+2/5+2/7+3/8+4/9+2/7+2/9=?
求比值 2/5:1.4 3/7:5/21 2:5/8 0.15:0.265 9:5 6/25:5/8 16:50 0.4:7/5
15.9/7 - ( 2/7 – 10/21 ) 5/9 × 18 – 14 × 2/7 4/5 × 25/16 + 2/315.9/7 - ( 2/7 – 10/21 ) 5/9 × 18 – 14 × 2/7 4/5 × 25/16 + 2/3 × 3/4 14 × 8/7 – 5/6 × 12/15 17/32 – 3/4 × 9/24
-9+6÷(-3) -7+5×(-6)-16÷(-8) 直接写结果 (-25)×4= (-8)×0×(-2分之3)=-9+6÷(-3) -7+5×(-6)-16÷(-8) (-25)×4= ( -8)×0×(-2分之3)= (-6分之5)×(-15分之8)=
求九宫格数独9-- --- --7 --2 --- 6-- --- 6-9 --5 -9- 3-2 -5- --4 -8- 7-- -6- 7-1 -8 - --- 2-8 --4 --1 --- 3-- 25- --- -19
1,1,2,4,3,9,4,16,( )25,6,( ),.15,16,13,19,11,22,( ),25,7,( ),.填入适当的数2 6 7 11 2 3 14 4 ()1 3 5 23 5 5 6 4()3填入适当的数3,5,7,11,15,19,23,.6,12,33,27,21,10,15,30,.2,5,10,16,22,28,32,38,24,...2,3,5,8,12,16,23,3
2/1+4/2+8/3+16/4+32/5+64/6+128/7+256/8
人教版2/6除4/12 2/3除4/6 10/16除5/8 6/15除3/10 1/9除7/9 2/8除3/16 6/7除12/14 3/5除1/5 6/25除12/15 1/3除4/5 5/6除15/20
化简比(见补充)5/2:1/35/3:3/51/15:1/313/6:1/35/3:5/92/3:5/25/8:5/45/2:5/314/9:7/510/7:5/316/7:16/54/3:3/29/7:27/1113/5:8/515/16:5/37/8:38/24
3X+6=18 16+8×=40 2X-7、5=8、5
12,-4,8,-32,-24,768,()5,3,7/3,2,9/5,5/3,()6,7,18,23,38,()2,3,7,25,121,()12,16,22,30,39,49,()
3/8+(2/5-6/25)=?
1+1+2+2+3+3+4+5+6+7+8+9+14+25+36=
(12分之5-4分之1)6分之5 3分之2+4分之5*5分之2-6分之5 25分之18*16分之9+25分之7*16分之9+16分之963*(9分之5+21分之4-7分之3)【8分之5-(2分之1+3分之1)*4分之3】/23分之16(21*7分之3+7分之4*21)*4分之15分之4*6分
计算行列式D=2 7 8 9 -5 3 1 -8 1 7 8 9 6 4 2 -16
过程1/3+1/6+1/4 2/5-3/4+7/10 2/5-1/3+1/2 5/8+2/5-3/1过程1/3+1/6+1/42/5-3/4+7/102/5-1/3+1/25/8+2/5-3/16
找规律 (1)1 4 9 16 25() (2)21 20 18 15 11 ( ) (3)65536 256 16( ) (4)3 8 ( ) 3968( 5)8 6 7 5 6 4 ( ) ( )