НУ
1 3/5×2 1/2=
3 1/6×24=
7 7/12×12/21=
121×4 1/11=
10 1/4× 1 1/41

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Пошаговое объяснение:

28 * 2 3/4 = 28 * 11/4 = 7*11 / 1 = 77

1 3/5 * 2 1/2 = 8/5 * 5/2 = 8/2 = 4

3 1/6 * 24 = 19/6 * 24 = 19*4 / 1 = 76/1 = 76

7 7/12 * 12/21 = 91/12 * 12/21 = 91/21 = 4 7/21 =

4 1/3

121 * 4 1/11 = 121 * 45/11 = 11*45 / 1 = 495/1 = 495

10 1/4 * 1 1/41 = 41/4 * 42/41 = 42/4 = 10 2/4 =

10 1/2

Пошаговое объяснение:

28×2 3/4=28*11/4=77

1 3/5×2 1/2=8/5*5/2=4

3 1/6×24=19/6*24=76

7 7/12×12/21=91/12*12/21=13/3=

4 1/3

121×4 1/11=121*45/11=495

10 1/4× 1 1/41=41/4*42/41=21/2=

10 1/2