Question

Вычислите, используя законы умножения. е) 1/12 * ( 12 + 1/5) = к) 1/20 * ( 80 + 1/5 ) = з) 1/4 * ( 16 + 1/8 ) = пятый класс. 34 : \

Answer 1

Е) 1/12×(12+1/5)= 1/12×61/5= 61/60
к) 1/20×(80+1/5)= 1/20×401/5= 401/100
з) 1/4×(16+1/8)= 1/4×129/8= 129/32

Answer 2

$\frac{1}{12} \times (12 + \frac{1}{5} ) = \frac{1}{12} \times \frac{61}{5} = \frac{61}{60} = 1 \frac{1}{60}$
$\frac{1}{20} \times (80 + \frac{1}{5} ) = \frac{1}{20} \times \frac{401}{5} = \frac{401}{100} = 4.01$
$\frac{1}{4} \times (16 + \frac{1}{8} ) = \frac{1}{4} \times \frac{129}{8} = \frac{129}{32} = 4 \frac{1}{32}$