能簡算的要簡算8/9×(5/9-1/4)×8/11 4/9×(3/10-5/6×3/10)3/8×(3/5-1/3×3/10) 4/9×(3/10-5/6×3/10)3/8×(3/5-1/3×3/10)

能簡算的要簡算8/9×(5/9-1/4)×8/11 4/9×(3/10-5/6×3/10)3/8×(3/5-1/3×3/10) 4/9×(3/10-5/6×3/10)3/8×(3/5-1/3×3/10)

能簡算的要簡算
8/9×(5/9-1/4)×8/11
=8/9×(11/36×8/11)
=8/9×2/9
=16/81
4/9×(3/10-5/6×3/10)
=4/9×(3/10-1/4)
=4/9×1/20
=1/45
3/8×(3/5-1/3×3/10)
=3/8×(3/5-1/10)
=3/8×1/2
=3/16