Question

六年级五题能简算的要简算，急急急！

1. 2/3×12.5%+1/8×1/3-0.125

2. 4.32+7/11-2/11-1.32

3. 126×3/125

4. 124×3/125

5. 42/5-0.3+2/7
第五题是4又5分之二！谢谢！能简算的要简算，简算不了直接算，我想知道哪些是不能简算的！

Answer 1

1. 2/3×12.5%+1/8×1/3-0.125
=2/3×0.125+0.125×1/3-0.125×1
=(2/3+1/3-1)×0.125
=0

2. 4.32+7/11-2/11-1.32
=(4.32-1.32)+(7/11-2/11)
=3+5/11
=3又5/11

3. 126×3/125
=(125+1)×3/125
=125×3/125+1×3/125
=3+3/125
=3又3/125

4. 124×3/125
=(125-1)×3/125
=125×3/125-1×3/125
=3-3/125
=2又122/125

5. 42/5-0.3+2/7
=84/10-3/10+2/7
=81/10+2/7
=547/70

Answer 2

1.2/3×1/8+1/8+1/3-1/8=1/8×(2/3+1/3-1)=0

2、4.32+7/11-2/11-1.32
=4.32-1.32+7/11-2/11
=3+5/11
=38/11

3、126×3/125
=（1+125）×3/125
=3/125+3
=378/125

4、124×3/125
=（125-1）×3/125
=3-3/125
=372/125

5. 42/5-0.3+2/7
=547/70

Answer 3

2/3×12.5%+1/8×1/3-0.125
=0.125×(2/3+1/3-1)
=0
4.32+7/11-2/11-1.32
=(4.32-1.32)+(7/11-2/11)
=3+5/11
=带分数不能打，也不能自制
126×3/125
＝125×3/125+1×3/125
=3+3/125
124×3/125
=125×3/135-1×3/125