(21*3/7+4/7*21)*1/4
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(21*3/7+4/7*21)*1/4
(99+9/10)÷9
4/5+5/6÷5/8
14/15÷[(4/5+2/3)*10/11]
(5/6+4/5)*30
1/3+3÷1/2
5/6*6/5-9/10÷9/5
4-5/11-7/11
1/8*58+1/8*41+1/8
4/5*4/7*5/4-1/2
4/5*5/6+2/5÷3/5
4/5÷[(5/8-1/2)÷5/8]
235-135÷18
3/5*153-0.6*53
(99+9/10)÷9
4/5+5/6÷5/8
14/15÷[(4/5+2/3)*10/11]
(5/6+4/5)*30
1/3+3÷1/2
5/6*6/5-9/10÷9/5
4-5/11-7/11
1/8*58+1/8*41+1/8
4/5*4/7*5/4-1/2
4/5*5/6+2/5÷3/5
4/5÷[(5/8-1/2)÷5/8]
235-135÷18
3/5*153-0.6*53
(21*3/7+4/7*21)*1/4
=21*(3/7+4/7)*1/4
=21*1/4
=5.25
(99+9/10)÷9
=99÷9+9/10÷9
=11+1/10
=111/10
4/5+5/6÷5/8
=4/5+4/3
=32/15
14/15÷[(4/5+2/3)*10/11]
=14/15÷(14/15*10/11)
=14/15÷28/33
=11/10
(5/6+4/5)*30
=5/6*30+4/5*30
=25+24
=49
1/3+3÷1/2
=1/3+6
=19/3
5/6*6/5-9/10÷9/5
=1-1/2
=1/2
4-5/11-7/11
=4-12/11
=32/11
1/8*58+1/8*41+1/8
=18*(58+41+1)
=1800
4/5*4/7*5/4-1/2
=(4/5*5/4)*4/7-1/2
=4/7-1/2
=1/14
4/5*5/6+2/5÷3/5
=2/3+1/2
=7/6
4/5÷[(5/8-1/2)÷5/8]
=4/5÷(1/8÷5/8)
=4/5÷1/5
=4
235-135÷18
=235-7.5
=227.5
3/5*153-0.6*53
=3/5*(153-53)
=3/5*100
=60
累死我了
=21*(3/7+4/7)*1/4
=21*1/4
=5.25
(99+9/10)÷9
=99÷9+9/10÷9
=11+1/10
=111/10
4/5+5/6÷5/8
=4/5+4/3
=32/15
14/15÷[(4/5+2/3)*10/11]
=14/15÷(14/15*10/11)
=14/15÷28/33
=11/10
(5/6+4/5)*30
=5/6*30+4/5*30
=25+24
=49
1/3+3÷1/2
=1/3+6
=19/3
5/6*6/5-9/10÷9/5
=1-1/2
=1/2
4-5/11-7/11
=4-12/11
=32/11
1/8*58+1/8*41+1/8
=18*(58+41+1)
=1800
4/5*4/7*5/4-1/2
=(4/5*5/4)*4/7-1/2
=4/7-1/2
=1/14
4/5*5/6+2/5÷3/5
=2/3+1/2
=7/6
4/5÷[(5/8-1/2)÷5/8]
=4/5÷(1/8÷5/8)
=4/5÷1/5
=4
235-135÷18
=235-7.5
=227.5
3/5*153-0.6*53
=3/5*(153-53)
=3/5*100
=60
累死我了
(21*3/7+4/7*21)*1/4
8/3×(1/3-8/21×8/16) 99×7/10 (3/7+4/21)×21 5/17×9/24+9/17×7/2
(21乘以7分之3+7分之4乘以21)乘以4分之1=简算
5分之3乘(7分之1+21分之8除7分之4)(要简算,
(1×2×3+2×4×6+4×8×12+7×14×21)÷(1×3×5+2×6×10+4×12×20+7×21×35)
1+2-3+4+5-9+8+7-0+21
1/21+5/8+4/9+3/7=
找规律填数 1 3 7 () 21 () 1 4 5 10 () ()
0.4 ,0.8,( ) () 16 ,4,1,4分之1,( ) ( ) 7,5 ,14,4,21,3,( ) ( )
4/1*3+4/3*5+4/5*7+4/7*9+4/9*11+.+4/19*21计算方法
计算-22/7*(22/7-4/3)*7/22*(-21/22)
九宫格的数学题填数字 (1) 1 4 7 3 5 2 7 ?11 (2) 7 16 9 5 21 16 9 ? 4 (3