六年級分數四則運算題

六年級分數四則運算題

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
8. 101×1/5–1/5×21
=(101-21)x1/5
=80x1/5
=16