一、6÷3/8–3/8÷6
=1/6x(3/8-3/8)
=1/6x0
=0
二、4/7×5/9+3/7×5/9
=(4/7+3/7)x5/9
=1x5/9
=5/9
三、5/2-(3/2+4/5)
=5/2-3/2-4/5
=1-4/5
=1/5
四、6×(1/2+2/3)
=6x1/2+6x2/3
=3+4
=7
五、8×4/5+8×11/5
=8x(4/5+11/5)
=8x3
=24
一、6÷3/8–3/8÷6
=1/6x(3/8-3/8)
=1/6x0
=0
二、4/7×5/9+3/7×5/9
=(4/7+3/7)x5/9
=1x5/9
=5/9
三、5/2-(3/2+4/5)
=5/2-3/2-4/5
=1-4/5
=1/5
四、6×(1/2+2/3)
=6x1/2+6x2/3
=3+4
=7
五、8×4/5+8×11/5
=8x(4/5+11/5)
=8x3
=24
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