15×40= 480÷6= 12×20= 125×80=
39×201≈ 162×42≈ 240×50= 126÷2=
— No, it doesn't.
— ______________
— Yes, they are.
滋
慈
三百万、二十万、六万和一千
七千万、九万和二百
九千万和九千
①386×35=
②700÷25=
③305×50=
④980÷50=
⑤※134×16=
⑥※850÷42=
硝酸钾可以溶解在水中,请根据实验回答问题:
温度(℃) |
20 |
30 |
40 |
50 |
60 |
70 |
80 |
90 |
100 |
溶解的硝酸钾(克) |
32 |
46 |
64 |
86 |
110 |
138 |
169 |
202 |
246 |
①分析数据可以知道:“100毫升水中能溶解多少克硝酸钾”受到因素的影响。
②以上实验结束时,温度100℃的100毫升水中最多能溶解246克硝酸钾,如果想要溶解更多的硝酸钾,正确的方法是()。
A.降低温度 B.不断搅拌 C.加更多的开水
A. The swimming pool is opposite the gym.
B. There is a plane between the two boxes.
C. I like to do my homework in the bedroom.
D. There are four chairs and a big table in my kitchen.
E. There is a dog under the bed.
F. There are forty desks and forty chairs in the classroom.
在上面这些数中自然数有:、、、、.
(按题中数的顺序填写)