337 chicks hatched 900 eggs, more in the afternoon than in the morning 1 18. How many chicks hatched today?
① 900 ≈ 337 ≈ 2 (only) ②18× 2 ≈ 306 (only) ③ 306+ 165438 ≈ 424 (only) A: On this day, 424 chickens were hatched.
① 337-118 = 219 (only) ②2 19÷2= 109 (only) ... 0.5 (only) ③109.