Реши эти примеры

Вариант №1 №1: 1. 2/5 * 3/7 = 6/35 2. 1/8 * 5/6 = 5/48 3. 7/11 * 2/3 = 14/33 4. 10/11 * 2/3 = 20/33 5. 1/15 * 4/5 = 4/75 №2: 1. 8 * 2/3 = 16/3 = 5 1/3 2. 3/5 * 5 = 3 3. 12/13 * 2 = 24/13 = 1 11/13 4. 11 * 1/2 = 11/2 = 5 1/2 5. 6 * 10/11 = 60/11 = 5 5/11 №3: 1. 12/15 * 3/4 = (12*3)/(15*4) = 36/60 = 3/5 2. 11/16 * 4/33 = (11*4)/(16*33) = 44/528 = 1/12 3. 7/10 * 5/21 = (7*5)/(10*21) = 35/210 = 1/6 4. 12/100 * 50/12 = 50/100 = 1/2 5. 14/32 * 64/7 = (14*64)/(32*7) = 2 * 2 = 4 №4: 1. 2 1/2 * 2/5 = 5/2 * 2/5 = 1 2. 3 1/2 * 1 1/2 = 7/2 * 3/2 = 21/4 = 5 1/4 3. 1 1/3 * 2 1/4 = 4/3 * 9/4 = 3 4. 1 1/3 * 2/3 = 4/3 * 2/3 = 8/9 5. 2 1/5 * 2 3/11 = 11/5 * 25/11 = 5 Вариант №2 №1: 1. 4/5 * 3/7 = 12/35 2. 1/8 * 5/7 = 5/56 3. 7/13 * 2/3 = 14/39 4. 10/11 * 2/5 = 20/55 = 4/11 5. 1/15 * 4/3 = 4/45 №2: 1. 4 * 2/3 = 8/3 = 2 2/3 2. 3/4 * 4 = 3 3. 12/13 * 3 = 36/13 = 2 10/13 4. 13 * 1/2 = 13/2 = 6 1/2 5. 4 * 10/11 = 40/11 = 3 7/11 №3: 1. 10/15 * 3/4 = (10*3)/(15*4) = 30/60 = 1/2 2. 11/16 * 4/55 = (11*4)/(16*55) = 1/20 3. 9/10 * 5/27 = (9*5)/(10*27) = 45/270 = 1/6 4. 13/100 * 50/13 = 50/100 = 1/2 5. 21/32 * 64/7 = (21*64)/(32*7) = 3 * 2 = 6 №4: 1. 2 1/3 * 3/7 = 7/3 * 3/7 = 1 2. 3 1/2 * 1 1/2 = 7/2 * 3/2 = 21/4 = 5 1/4 3. 1 1/2 * 2 1/3 = 3/2 * 7/3 = 7/2 = 3 1/2 4. 1 1/2 * 2/3 = 3/2 * 2/3 = 1 5. 2 2/5 * 2 3/11 = 12/5 * 25/11 = (12*5)/11 = 60/11 = 5 5/11 Вариант №3 №1: 1. 2/5 * 2/7 = 4/35 2. 1/7 * 5/6 = 5/42 3. 7/11 * 2/9 = 14/99 4. 8/11 * 2/3 = 16/33 5. 1/15 * 4/5 = 4/75 №2: 1. 7 * 2/3 = 14/3 = 4 2/3 2. 2/9 * 9 = 2 3. 10/11 * 2 = 20/11 = 1 9/11 4. 11 * 1/3 = 11/3 = 3 2/3 5. 2 * 10/11 = 20/11 = 1 9/11 №3: 1. 18/15 * 3/4 = (18*3)/(15*4) = 54/60 = 9/10 2. 11/20 * 4/33 = (11*4)/(20*33) = 44/660 = 1/15 3. 7/15 * 5/21 = (7*5)/(15*21) = 35/315 = 1/9 4. 12/150 * 50/12 = 50/150 = 1/3 5. 14/16 * 32/7 = (14*32)/(16*7) = 2 * 2 = 4 №4: 1. 2 1/2 * 1/5 = 5/2 * 1/5 = 1/2 2. 3 1/2 * 2 1/2 = 7/2 * 5/2 = 35/4 = 8 3/4 3. 1 1/3 * 1 1/4 = 4/3 * 5/4 = 5/3 = 1 2/3 4. 1 1/2 * 2/5 = 3/2 * 2/5 = 3/5 5. 1 1/5 * 2 1/6 = 6/5 * 13/6 = 13/5 = 2 3/5