3.14×20= + = 0.5÷0.01= 0.32× =
21÷21%= × = 6-3 = ÷ =
(填最大数)
÷2=
9.42÷3.14=
5﹣1.4=
44÷=
40×=
2×=
9÷=
1+19%=
3÷=
×50%=
1.4÷10%=
-+=
×=
1÷25=
3.4﹣1.52=
1+-÷1=
-=
2÷=
÷6=
:=
8.4÷4.2=
10÷1%=
1÷3×=
0÷×14=
7×14= 12.2-0.5= 1-30%-30%= 0.42=
-= 8:2.5:4= 2.3+1.77= ÷=
0.15×6= 25.6×25%= 0.4 := 3.14×7.6-3.14×3.6=
0.810.1= 2.1÷=
1×3+1=22
2×4+1=32
3×5+1=42
……
×+1=20222
n×(n+2)+1=2(n为自然数)