×16 = 12÷ = × = 0× + =
1÷ = ÷ = ÷ = 0.8+2.35 =
① × + ×
② ×( - )
③24× ×9×
④30×( + )
⑤51×
⑥ + ÷
① =
②x+ =
③x+ =39
④x - =
⑤x÷ =
⑥ × =
①电影院在学校北偏东30°的方向上,距离是300米;
②书店在学校东偏南60°的方向上,距离是400米。