А)3/5 × 4/9= Б)7/9×21/25=
В)5/7×(21/30-7/30)+16/21:8/7=
Г)(1/2-1/3):1/3-1/4×(3/2)=
Д)3/11×X=5
Е)X:4/17=34/39
Ж)(11/12×13/17)×(17/13×22/33)
З)65×5/13+65×4/13
В)5/7×(21/30-7/30)+16/21:8/7=
Г)(1/2-1/3):1/3-1/4×(3/2)=
Д)3/11×X=5
Е)X:4/17=34/39
Ж)(11/12×13/17)×(17/13×22/33)
З)65×5/13+65×4/13
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