a) 8*129 + 8*171; 6) 4.8*3.7 - 4.8*2.7; в) 6.35*4.4 + 4.4*2.65;

a)

• \[ 8 \times 129 + 8 \times 171 = 8 \times (129 + 171) = 8 \times 300 = 2400 \]

б)

• \[ 4.8 \times 3.7 - 4.8 \times 2.7 = 4.8 \times (3.7 - 2.7) = 4.8 \times 1 = 4.8 \]

в)

• \[ 6.35 \times 4.4 + 4.4 \times 2.65 = 4.4 \times (6.35 + 2.65) = 4.4 \times 9 = 39.6 \]

Ответ: а) 2400; б) 4.8; в) 39.6