0.25×40= 1-80%= 0.3×20%= 0.75÷ = 52-12=
3- = - = 0÷ = 0.21÷0.7= 1- + =
6.5:x=3.25:4 24%:=
1+2%=
①75%x=360
②(1-55%)x=90
③31%x-66=8.4
④25%x+50%x=420
= 0.3÷0.4= 25×4%= +75%= ()×6=
6×÷2= ÷2÷= 11×-=
+0.625=
12-=
1÷0.05=
9.7+0.03=
10÷10%=
3.5×0.2=
12×101=
103×30=
6×0.15=
280÷42≈
0.05÷5%=
3.6-60%=
0÷=
72÷=
物体质量(kg)
0
1
2
3
4
5
6
7
弹簧伸长长度(cm)
0.5
1.5
2.5
3.5