Ответ будет 1/7 1).105/147×21/50-70/149×17/210-3/14×7/9
2).9/10×20/27+5/16÷10/24-5/9×1 7/20
3).69/70×7/23-4/25÷4/5+3/5×25/36
4).120/169×13/60+200/243÷100/81-1/13×10
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Ответ будет 1/7 1).105/147×21/50-70/149×17/210-3/14×7/9
2).9/10×20/27+5/16÷10/24-5/9×1 7/20
3).69/70×7/23-4/25÷4/5+3/5×25/36
4).120/169×13/60+200/243÷100/81-1/13×10