Выполните умножение 513*3, 12*4, 4*1 12, 5*2 17, 3*1 14
Помоги!!!
5/13 * 3 = 15/13 = 1 2/13
1/2 * 4 = 4/2 = 2
4 * 1 1/2 = 4 * 3/2 = 12/2 = 6
5 * 2 1/7 = 5 * 9/7 = 45/7 = 6 3/7
3 * 1 1/4 = 3 * 5/4 =15/4 = 3 3/4 = 3.75
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