Question

Condiția și Nr
a) 102×13
d)127×23+127×77​

Answer 1

a) 102x13=100x13+2x13=1300+26=1 326

b)127x23+127x77=127x(23+77)=127x100=12 700

Answer 2

$\bold{a)} \ 103 \cdot 13=13(100+2)=100\cdot 13+2 \cdot 13=1 \ 300 + 26=\boxed{1 \ 326}; \\ \bold{b)} \ 127\cdot 23+127\cdot 77=127(23+77)=127 \cdot 100=\boxed{12 \ 700}.$