①13.5×98=13.5×100-13.5×2运用了乘法分配律;
②无限小数一定是循环小数;
③小明和小红玩剪刀石头布,两人出拳时可能出现9种情况;
④丽丽在计算时把4.13×5抄成4.23×5,所得的积结果与正确的得数比较会减少0.05;
⑤因为1.47÷1.2的商是1.2,余数是0.03,所以根据商不变的规律可知14.7÷12的商也是1.2;余数是0.03。
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