高难度数学计算题及答案六年级

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高难度数学计算题及答案六年级

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

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