2.5+6=
0.12=
1-=
+=
1.5×20%=
24÷3%=
2400÷150÷2=
0.2×54=
0.052=
①4.82﹣5.2÷0.8×0.6
② ÷[ ×( - )]
③78.53﹣(8.53﹣6.94)
④( + - )÷
⑤53.5×5.8+0.42×535
⑥0.72- +2.28-
气温/℃
12
13
14
15
蟋蟀每分钟叫的次数
63
70
77
84