NO.1
150×12÷(12 - 2) = 180 米
NO.2
(42 - 9×2÷4.5 + 42)×4.5 = 360 千米
NO.3
五年级 = 45÷ (1.2 - 1) = 225
六年级 = 225 + 45 = 270
NO.4
30×1.8÷(0.6×0.6)×2 = 300 个.
NO.1
150×12÷(12 - 2) = 180 米
NO.2
(42 - 9×2÷4.5 + 42)×4.5 = 360 千米
NO.3
五年级 = 45÷ (1.2 - 1) = 225
六年级 = 225 + 45 = 270
NO.4
30×1.8÷(0.6×0.6)×2 = 300 个.