如题所述
1. 6÷ 3/8 – 3/8 ÷6
=1/6x(3/8-3/8)
=1/6x0
=0
2. 4/7 × 5/9 + 3/7 × 5/9
=(4/7+3/7)x5/9
=1x5/9
=5/9
3. 5/2 -( 3/2 + 4/5 )
=5/2-3/2-4/5
=1-4/5
=1/5
4. 6 ×( 1/2 + 2/3 )
=6x1/2+6x2/3
=3+4
=7
5. 8 × 4/5 + 8 × 11/5
=8x(4/5+11/5)
=8x3
=24
6. 31 × 5/6 – 5/6
=(31-1)x5/6
=30x5/6
=25
7. 4/5 × 25/16 + 2/3 × 3/4
=5/4+1/2
=5/4+2/4
=7/4
8. 101 × 1/5 – 1/5 × 21
=(101-21)x1/5
=80x1/5
=16追问
=1/6x(3/8-3/8)
=1/6x0
=0
2. 4/7 × 5/9 + 3/7 × 5/9
=(4/7+3/7)x5/9
=1x5/9
=5/9
3. 5/2 -( 3/2 + 4/5 )
=5/2-3/2-4/5
=1-4/5
=1/5
4. 6 ×( 1/2 + 2/3 )
=6x1/2+6x2/3
=3+4
=7
5. 8 × 4/5 + 8 × 11/5
=8x(4/5+11/5)
=8x3
=24
6. 31 × 5/6 – 5/6
=(31-1)x5/6
=30x5/6
=25
7. 4/5 × 25/16 + 2/3 × 3/4
=5/4+1/2
=5/4+2/4
=7/4
8. 101 × 1/5 – 1/5 × 21
=(101-21)x1/5
=80x1/5
=16追问
太少
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第1个回答 2012-02-17
1+1=2
第2个回答 2012-02-11
不知道(⊙o⊙)哦
第3个回答 2012-07-25
25%×132+1/4×8 2)
=1/4×132+1/4×8
=1/4×(132+8)
=1/4×140
=35
32×0.125×25
=(4+8)×0.125×25
=(4×25)×(8×0.125)
=100×1
=1000
75%×76+25×4+0.75×12
=3/4×76+3/4×12+25×4
=3/4×88+100
=166
3200×1/8÷2/5+1270 5)
=400×5/2+1270
=1000+1270
=2270
6×(1/2+2/3)
=6×1/2+6×2/3
=3+4
=7
72.25%×99+75.25%
=75.25%×99+75.25%×1
=75.25%×(99+1)
=75.25%×100
=75.25
2700×(506-499)÷900
=2700×7÷900
=18900÷900
=21 =10
33.02-(148.4-90.85)÷2.5
=33.02-57.55÷2.5
=33.02-23.02
(1÷1-1)÷5.1
=(1-1)÷5.1
=0÷5.1
=0
18.1+(3-0.299÷0.23)×1
=18.1+1.7X1
=18.1+1.7
=19.8
1. 6÷ 3/8 – 3/8 ÷6
=1/6x(3/8-3/8)
=1/6x0
=0
2. 4/7 × 5/9 + 3/7 × 5/9
=(4/7+3/7)x5/9
=1x5/9
=5/9
3. 5/2 -( 3/2 + 4/5 )
=5/2-3/2-4/5
=1-4/5
=1/5
4. 6 ×( 1/2 + 2/3 )
=6x1/2+6x2/3
=3+4
=7
5. 8 × 4/5 + 8 × 11/5
=8x(4/5+11/5)
=8x3
=24
6. 31 × 5/6 – 5/6
=(31-1)x5/6
=30x5/6
=25
7. 4/5 × 25/16 + 2/3 × 3/4
=5/4+1/2
=5/4+2/4
=7/4
8. 101 × 1/5 – 1/5 × 21
=(101-21)x1/5
=80x1/5
=16
=1/4×132+1/4×8
=1/4×(132+8)
=1/4×140
=35
32×0.125×25
=(4+8)×0.125×25
=(4×25)×(8×0.125)
=100×1
=1000
75%×76+25×4+0.75×12
=3/4×76+3/4×12+25×4
=3/4×88+100
=166
3200×1/8÷2/5+1270 5)
=400×5/2+1270
=1000+1270
=2270
6×(1/2+2/3)
=6×1/2+6×2/3
=3+4
=7
72.25%×99+75.25%
=75.25%×99+75.25%×1
=75.25%×(99+1)
=75.25%×100
=75.25
2700×(506-499)÷900
=2700×7÷900
=18900÷900
=21 =10
33.02-(148.4-90.85)÷2.5
=33.02-57.55÷2.5
=33.02-23.02
(1÷1-1)÷5.1
=(1-1)÷5.1
=0÷5.1
=0
18.1+(3-0.299÷0.23)×1
=18.1+1.7X1
=18.1+1.7
=19.8
1. 6÷ 3/8 – 3/8 ÷6
=1/6x(3/8-3/8)
=1/6x0
=0
2. 4/7 × 5/9 + 3/7 × 5/9
=(4/7+3/7)x5/9
=1x5/9
=5/9
3. 5/2 -( 3/2 + 4/5 )
=5/2-3/2-4/5
=1-4/5
=1/5
4. 6 ×( 1/2 + 2/3 )
=6x1/2+6x2/3
=3+4
=7
5. 8 × 4/5 + 8 × 11/5
=8x(4/5+11/5)
=8x3
=24
6. 31 × 5/6 – 5/6
=(31-1)x5/6
=30x5/6
=25
7. 4/5 × 25/16 + 2/3 × 3/4
=5/4+1/2
=5/4+2/4
=7/4
8. 101 × 1/5 – 1/5 × 21
=(101-21)x1/5
=80x1/5
=16