Пошаговое объяснение:
1) 8×5/12=10/3
2) 21/4×1/7=3/4
3) 10/3:3/4=10/3×4/3=40/9
4) 15/7×7/5=3
5) 4×9/8=9/2
6) 3:9/2=3×2/9=2/3
7) 40/9:2/3=40/9×3/2 =20/3=6целых2/3
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Пошаговое объяснение:
1) 8×5/12=10/3
2) 21/4×1/7=3/4
3) 10/3:3/4=10/3×4/3=40/9
4) 15/7×7/5=3
5) 4×9/8=9/2
6) 3:9/2=3×2/9=2/3
7) 40/9:2/3=40/9×3/2 =20/3=6целых2/3