①鼓楼小学有女生128人,比男生多4人,男生有多少人?
②一箱医用口罩用去558个后还剩442个,这箱医用口罩原来有多少个?
③福州动物园全天共卖出门票956张,上午卖出496张,下午卖出多少张?
④地上原来有158个桃子,小猴又摘来了98个桃子,现在有多少个桃子?
A.1 | B.2 | C.3 | D.4 |
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