Question

PRIMUL EXERCITIU H:4=5X2+9X7+5X6 K:4=5X6+9X8+5X1 AL DOILEA EXERCITIU APROXIMEAZA NR 286 10 SI 300 OFER COROANA

Answer 1

$\bold{1.} \ h:4=5 \cdot 2+9 \cdot 7+5 \cdot 6 \\ h:4=10+27+30 \\ h:4=37+30 \\ h:4=67 \\ h=67 \cdot 4 \\ \boxed{h=268}; \\ \\ k:4=5 \cdot 6+ 9\cdot 8+5 \cdot 1 \\ k:4=30+81+5 \\ k:4=111+5 \\ k:4=116 \\ k=116 \cdot 4 \\ \boxed{k=464}. \\ \bold{2.} \ 286 \approx 300; \\ 10 \approx1; \\ 300 \approx 500.$