1樓:樂為人師
2×[(3/8-3/4×1/3)÷1/4]=2×[(3/8-1/4)÷1/4]
=2×[1/8÷1/4]
=2×1/2=1
2樓:匿名使用者
2×[(3/8-3/4×1/3)÷1/4]=2×[(3/8-1/4)x4]
=2×[1/8x4]
=2×1/2
=1謝謝,請採納
脫式計算,能簡便要簡便。 3/5×1/5÷3/5 2/7-5/8×2/7 1/4÷2/3+2/3÷
3樓:匡吉月卷翼
脫式計算,能簡便要簡便。
3/5×1/5÷3/5
=3/5÷3/5×1/5
=1/5
2/7-5/8×2/7
=(1-5/8)×2/7
=3/8×2/7
=3/28
1/4÷2/3+2/3÷4
=3/2÷4+2/3÷4
=(3/2+2/3)÷4
=13/6÷4
=13/24
1/3÷1/5+4/5
=5/3+4/5
=37/15
[1-(1/4+3/8)]÷1/4
=(1-5/8)×4
=3/8×4
=3/2
4/9×3/16+5/12
=1/12+5/12
=1/2
3/9-1/3×3/9
=(1-1/3)×1/3
=2/9
解方程1/2x÷1/4=8
1/2x=2
x=41/4x+2/3=3
1/4x=3-2/3
1/4x=7/3
x=28/3
1/3x+1/2x=5
5/6x=5
x=62/5x+1/3×6=4
2/5x=4-2
2/5x=2
x=52/7x=1/2×3/14
2/7x=3/28
x=3/8
4.5x+x=11/17
5.5x=11/17
x=2/17
x-1/12x=22
11/12x=22
x=24
脫式計算 (2-2/3)×2/9÷4 9/16÷(3/8+1/16)
4樓:瀛洲煙雨
(2-2/3)×2/9÷4
=4/3×1/4×2/9
=1/3×2/9
=2/27
5樓:丹凝心孝芙
你的題目好象少了項9×(6×8)啊
呵呵,如果是這樣的話,原式=(2×3)(1+4+9+16)/(2×3)(1+4+9+16)(2×4)=1/8
脫式計算,4/5÷[8×(1/2-2/5)],[1-(1/4+3/8)]÷1/4?
6樓:匿名使用者
4/5÷[8×
(1/2-2/5)]
=4/5÷[8×1/10]
=4/5÷4/5
=1[1-(1/4+3/8)]÷1/4
=[1-5/8]÷1/4
=3/8÷1/4
=3/2
9×13×(5/13+5/9)
=9×13×5/13+9×13×5/9
=45+65
=110
7樓:妙酒
4/5÷[8×(1/2-2/5)]
=4/5÷(8x1/10)
=4/5÷4/5
=1[1-(1/4+3/8)]÷1/4
=(1-5/8)x4
=3/8x4
=3/2
9×13×(5/13+5/9)
=9x13x5/13+9x5/9x13
=9x5+5x13
=5x(9+13)
=5x22
=110
脫式計算(能簡算的要簡算) (1)1/4÷(2/3-3/2×1/3) (2)24×(1/6+3/8+7/
8樓:昨夜星辰吉日
(1)1/4÷(2/3-3/2×1/3)
=1/4÷(2/3-1/2)=1/4÷(4/6-3/6)=1/4÷1/6=1/4x6=6/4=3/2;
(2)24×(1/6+3/8+7/12)=24x1/6+24x3/8+24x7/12=4+9+14=27;
(3)1/8×58+1/8×41+1/8=1/8x(58+41+1)=1/8x100=100/8=12.5.
9樓:
(1)1/4÷(2/3-3/2×1/3)=3/2
(2)24×(1/6+3/8+7/12)=27
(3)1/8×58+1/8×41+1/8=25/2
10樓:匿名使用者
(1)1/4÷(2/3一3/2×1/3)=1/4÷(4/6一3/6)=1/4×6/1=3/2
8/9÷(4/3-1/3÷1/2)脫式計算,能簡算的要簡算
11樓:匿名使用者
原式=8/9÷(4/3-2/3)
=8/9÷2/3
=8/9 ×3/2
=4/3
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