商品 | 水晶杯 | 毛绒玩具兔 | 薯片 | QQ糖 |
价格(元) | 15.80 | 12.50 | ? | 2.00 |
(1)小青要给好朋友送个礼物,她想买一个水晶杯,结果还差1.2元,最后她只买了一只毛绒玩具兔,小青还剩多少元?
(2)弟弟买了一包QQ糖和3包薯片一共花了33.5元,每包薯片多少元?
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2