13 + 25 =
23 ﹣ 25 =
34 + 38 =
12 ﹣ 16 =
35 × 79 =
127 × 1415 =
47 ÷ 814 =
59 ÷ 56 =
15×0.4=
10÷2.5=
2.4×5=
0.78÷1.3=
体育课上,老师测量跳远成绩的依据是( )