數學加減乘除

1.6除9分4加3又8分5(要列橫色)
= 6÷4/9+3 5.8
= 6*9/4+3 5/8
= 27/2+3 5/8
= 13 1/2+ 3 5/8
= 13 4/8 + 3 5/8
= 16 9/8
=17 1/8

2. 8又10分1減7又5分1除1又7分5(要列橫色)
=8 1/10-7 1/5÷1 5/7
=8 1/10 - 36/5÷12/7
=8 1/10 - 36/5*7/12
=8 1/10 – 21/5
=8 1/10 – 4 1/5
=8 1/10 – 4 2/10
=7 11/10 – 4 2/10
=3 9/10

3. 3又3分1除(1又2分1加8分3) (要列橫色)
=3 1/3÷(1 1/2+3/8)
=3 1/3÷(1 4/8+3/8)
=3 1/3÷1 7/8
=10/3 ÷ 15/8
=10/3 * 8/15
=16/9
=1 7/9
4. 6又8分7除1又6分5減2又2分?=
5. 1又3分1加2又9分2除1又3分2=
=1 1/3+2 2/9÷1 2/3
=1 1/3+ 20/9÷5/3
=1 1/3 + 20/9*3/5
=1 1/3 + 4/3
=1 1/3 + 1 1/3
=2 2/3
6. 2又12分1除1又4分1乘2又5分2=
= 2 1/12÷1 1/4*2 2/5
=25/12÷5/4*12/5
=25/12*4/5*12/5
=4
7. (2又8分3加3又2分1) 乘1又9分7=
=(2 3/8+3 1/2)*1 7/9
=2 3/8+3 4/8)*1 7/9
=5 7/8*1 7/9
=47/8*16/9
=94/9
=10 4/9
8. 1又8分5除(3又7分4減1又14分1)=
=1 5/8÷(3 4/7-1 1/14)
=1 5/8÷(3 8/14-1 1/14)
=1 5/8÷2 7/14
=13/8÷2 1/2
=13/8 * 2/5
=13/20
9. 14又10分9乘2除50=
=14 9/10*2÷50
=149/10*2*1/50
=149/250
10. 4又2分1除189乘6又6分1=
=4 1/2÷189*6 1/6
=9/2*1/189*37/6
=1/2*1/21*37/6
=37/252
11.(5又5分1加2又2分1)除10分3=
=(5 1/5+2 1/2) ÷3/10
=(5 2/10+2 5/10) ÷3/10
=7 7/10 * 10/3
= 77/10*10/3
=77/3
=25 2/3