Question

ayuda porfa
$7 \times 10^{8} + 2 \times 10^8$
$5 \times 10 ^{12} + 9 \times 10 ^{12}$
$4 \times 10 ^{8} + 7 \times 10 ^{7}$
$3 \times 10 ^{4} + 2 \times 10^{3}$
$8 \times 10 {}^{5} + 4 \times 10 {}^{6}$
$5 \times 10 {}^{ - 8} + 4 \times 10 {}^{ - 9}$
$7 \times 10 {}^{ - 6} - 3 \times 10 {}^{ - 7}$
$5 \times 10 {}^{ - 12} - 2 \times 10 {}^{ - 13}$




​

Answer 1

Respuesta:

$10\time 15 {} { - 18} - 2\times 15 {} { - 16}$