×=
526﹣198= 0.32×2.5= n×n= kg:240g=
24×+= 2.6+1.98= -= 1.6÷25%=
÷= ×÷×0=
①3400÷17+125×80
②2.5×43+2.5
③(+﹣)÷
④×25××4
⑤×[0.8﹣(﹣0.15)]
⑥7.6﹣3÷7﹣
①12.5×3.2×2.5
②
③2023×
④ ÷[2﹣( )]
所受拉力
5N
6N
8N
10N
……
弹簧伸长
2cm
2.4cm
3.2cm
4cm