5×8= | 48+24= | 65-20= | 27+56= | 65-31= | 9×6= |
5×9= | 47-18= | 8×7= | 7×6= | 8×6= | 30-12-= |
54+9= | 100-32= | 6×6= | 45+29= | 80-58= | 46-8= |
7×9= | 20+32= | 7+12= | 5+23= | 48-39= | 75-6= |
(1)上题中一共有多少道加法、减法、乘法计算题?请用画“正”字的方法统计出来,并记录在下表里。
加法 | |
减法 | |
乘法 |
加法有( )道,减法有( )道,乘法有( )道,一共有( )道计算题。
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