12. Реши примеры:

Решение:

\( 60 - 30 : 3 = 60 - 10 = 50 \)

\( (50 - 5) : 9 = 45 : 9 = 5 \)

\( 70 + 28 : 7 = 70 + 4 = 74 \)

\( 56 : 8 \cdot 7 = 7 \cdot 7 = 49 \)

\( 8 \cdot 6 + 52 = 48 + 52 = 100 \)

\( 63 : (13 - 6) = 63 : 7 = 9 \)

\( 84 + 14 = 98 \)

\( 90 : 10 = 9 \)

\( 8 \cdot 10 = 80 \)