6道简便运算带答案六年级下偏难
3/7 × 49/9 - 4/3 =7/3-4/3 =1
8/9 ×5/12+ 1/27 =10/27+1/27 =11/27
12× 5/6 – 2/9 ×3 =10-2/3 =9又1/3 8× 5/4 + 1/4 =10+1/4 =10又1/4、 6÷ 3/8 – 3/8 ÷6 =16-1/16 =15又15/16
4/7 × 5/9 + 3/7 × 5/9 =（4/7+3/7）×5/9 =1×5/9 =5/9
5/2 -（ 3/2 + 4/5 ） =5/3-3/2-4/5
=1-4/5 =1/5
7/8 + （ 1/8 + 1/9 ） =7/8+1/8+1/9 =1+1/9 =1又1/9 9 × 5/6 + 5/6 =（9+1）×5/6 =10×5/6 =25/3
3/4 × 8/9 - 1/3 =2/3-1/3 =1/3
（1/2+1/3-1/5）×30 =1/2×30+1/3×30-1/5×30 =15+10-6 =19
