问一下数学题; (判断对错~ 判断算式对错)
A.340＋5分之2 (对错?在下面写上对或错)
B.340×(1+5分之2)
C.340+340×5分之2
D.340×5分之2
下一道 :
计算下列各题:
1. 12×9分之5+6分之1= (要带步骤的 拖式的)
2. 6分之1-3分之2×8分之1=
3.(10分之7＋4分之1)×5=
简便算法:
1. (5分之3-2分之1)×3分之5= (也要拖式 要简便算法!)
2. 24×36分之5-8分之3=
3. 9分之4×4分之3×11分之9=
4. 12×(3分之2+6分之1)=
5. 8分之5×9分之1×5分之4=
6. 4分之3×5分之2+4分之3×5分之3=
各位~ 拜托了~
你的第一道题没看明白什么意思~
计算下列各题（"/"是分数线)
1. 12×(5/9)+1/6 = 4×(5/3)+1/6 = 20/3+1/6 = 40/6 + 1/6 = 41/6
2. 1/6 - (2/3) ×(1/8) = 3/24-2/24= 1/24
3.(7/10 + 1/4)×5=(14/20+5/20)×5=19/20 ×5 = 19/4
简便算法:
1. (3/5-1/2)×(5/3)= (3/5)×(5/3)-(1/2)×(5/3)= 1-5/6=1/6
2. 24×(5/36)-3/8=10/3-3/8=80/24-9/24=71/24
3. 约分得3/11
4. =12×(2/3)+12×(1/6)=8+2=10
5.约分得1/18
6.=3/4×(2/5+3/5)=3/4×1=3/4
计算下列各题（"/"是分数线)
1. 12×(5/9)+1/6 = 4×(5/3)+1/6 = 20/3+1/6 = 40/6 + 1/6 = 41/6
2. 1/6 - (2/3) ×(1/8) = 3/24-2/24= 1/24
3.(7/10 + 1/4)×5=(14/20+5/20)×5=19/20 ×5 = 19/4
简便算法:
1. (3/5-1/2)×(5/3)= (3/5)×(5/3)-(1/2)×(5/3)= 1-5/6=1/6
2. 24×(5/36)-3/8=10/3-3/8=80/24-9/24=71/24
3. 约分得3/11
4. =12×(2/3)+12×(1/6)=8+2=10
5.约分得1/18
6.=3/4×(2/5+3/5)=3/4×1=3/4
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第1个回答 2009-10-09
楼主多大了
第2个回答 2009-10-09
计算下列各题（"/"是分数线)
1. 12×(5/9)+1/6 = 4×(5/3)+1/6 = 20/3+1/6 = 40/6 + 1/6 = 41/6
2. 1/6 - (2/3) ×(1/8) = 3/24-2/24= 1/24
3.(7/10 + 1/4)×5=(14/20+5/20)×5=19/20 ×5 = 19/4
简便算法:
1. (3/5-1/2)×(5/3)= (3/5)×(5/3)-(1/2)×(5/3)= 1-5/6=1/6
2. 24×(5/36)-3/8=10/3-3/8=80/24-9/24=71/24
3. 约分得3/11
4. =12×(2/3)+12×(1/6)=8+2=10
5.约分得1/18
6.=3/4×(2/5+3/5)=3/4×1=3/4
1. 12×(5/9)+1/6 = 4×(5/3)+1/6 = 20/3+1/6 = 40/6 + 1/6 = 41/6
2. 1/6 - (2/3) ×(1/8) = 3/24-2/24= 1/24
3.(7/10 + 1/4)×5=(14/20+5/20)×5=19/20 ×5 = 19/4
简便算法:
1. (3/5-1/2)×(5/3)= (3/5)×(5/3)-(1/2)×(5/3)= 1-5/6=1/6
2. 24×(5/36)-3/8=10/3-3/8=80/24-9/24=71/24
3. 约分得3/11
4. =12×(2/3)+12×(1/6)=8+2=10
5.约分得1/18
6.=3/4×(2/5+3/5)=3/4×1=3/4
第3个回答 2009-10-10
d.d.c.d
