( 2/3-4/1 ):2/5 ____________________= 1/2-7/2

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( 2/3-4/1 ):2/5 (2/3 - 12/3) ÷ 2/5 10/3 ÷ 2/5 ____________________= ___________________ = ____________ = 1/2-7/2 6/2 6/2 10/3 × 5/2 __________ = 25/3 ÷ 6/2 = 25/3 × 2/6 = 50/18 = 2 i 14/18 = 2 i 7/9 6/2

( 2/3-4/1 ):2/5 (2/3-12/3):2/5 -10/3*2/5 ____________________=____________________=__________= 1/2-7/2 -6/2 -6/2 -4/3 =___=-4/3: (-6/2)=-4/3*(-2/6)=8/9=2/3 -6/2