Ответ:
1) 2 3/4×4/11= 11/4×4/11=1
2) 1 3/4×1 5/7=7/4×12/7= 12/4=3
3) 4 4/5×3 3/4=24/5×15/4=18
4) 10×5 2/5= 10/1×27/5=54
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Ответ:
1) 2 3/4×4/11= 11/4×4/11=1
2) 1 3/4×1 5/7=7/4×12/7= 12/4=3
3) 4 4/5×3 3/4=24/5×15/4=18
4) 10×5 2/5= 10/1×27/5=54