(1.5+3分之2)÷3.75-3分之2
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(1.5+3分之2)÷3.75-3分之2
=(3/2+2/3)/3.75-2/3
=13/6/3.75-2/3
=13/(6*3.75)-2/3
=13/(6*27/4)-2/3
=(13*4)/(6*27)-2/3
=26/81-54/81
=-28/81
=(3/2+2/3)/3.75-2/3
=13/6/3.75-2/3
=13/(6*3.75)-2/3
=13/(6*27/4)-2/3
=(13*4)/(6*27)-2/3
=26/81-54/81
=-28/81
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(1.5+2/3)÷3.75-2/3
=(3/2+2/3) ÷ 15/4 - 2/3
=3/2 × 4/15 + 2/3 × 4/15 -2/3
=2/5 +2/3(4/15-1)
=2/5 + 2/3 (- 11/15)
=2/5- 2/3×11/15
=2/5-22/45
=-4/45
=(3/2+2/3) ÷ 15/4 - 2/3
=3/2 × 4/15 + 2/3 × 4/15 -2/3
=2/5 +2/3(4/15-1)
=2/5 + 2/3 (- 11/15)
=2/5- 2/3×11/15
=2/5-22/45
=-4/45
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