x-= x+=1-
0.25×40= 1-0.11= + = 3÷8=
10.5÷15= 9.09+1.01= - = 95÷96=
9.5+4.2=
0.8×1.3=
14.1÷3=
3.5×2=
8.1-2.7=
1.4×0.3=
7.9+0.1=
2.5×4=
3x+4x=
5.69-1.7=
2.5÷0.5=
7.2-1.08=
5-3.2=
5.8+5.7=
3.5÷2÷5=
4÷0.8=
9+2.19=
6b-5b=
16.5-(6.5+2.7)=
10-6.2-1.8=
1.53-0.5=
7.8+0.9=
12÷0.4=
102=
23=
4×0.25=
2.9+3.7+2.1=
1.25×5×8=
7.6×8+2.4×8=
①
②
③2.1x+7.9x=0.29
④12∶7=x∶0.3
①5+ x=20
② x+ x=26
①36×()
②1.3×37.5%+2.7×
③ [()]
④13÷()×