2/3(2+3/4)
=2/3(8+3)/4
=2/3(11/4)
=2/3×11/4
=(2×11)/(3×4)
=22/13
=(22÷2)/12÷2)
=11/6
2/3×2+3/4
=(2×2)/3+3/4
=4/3+3/4
=(16+9)/12
=25/12
1/2+1/3-1/6
=1/2+(2-1)/6
=1/2+1/6
=(3+1)/6
=4/6
=(4÷2)/(6÷2)
=2/3
1/2÷1/3÷1/4÷1/5
=1/2×3×4×5
=3/2×4×5
=12/2×5
=(12÷2)/(2÷2)×5
=6×5
=30
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2/3(2+3/4)
=2/3(8+3)/4
=2/3(11/4)
=2/3×11/4
=(2×11)/(3×4)
=22/13
=(22÷2)/12÷2)
=11/6
2/3×2+3/4
=(2×2)/3+3/4
=4/3+3/4
=(16+9)/12
=25/12
1/2+1/3-1/6
=1/2+(2-1)/6
=1/2+1/6
=(3+1)/6
=4/6
=(4÷2)/(6÷2)
=2/3
1/2÷1/3÷1/4÷1/5
=1/2×3×4×5
=3/2×4×5
=12/2×5
=(12÷2)/(2÷2)×5
=6×5
=30