-= += += ÷10= -+=
+= 15÷= ×= ×= ×36-×36=
1000×0.08=
0.78×20=
630×0.7=
0.4×3=
3.5×7=
0.01×5=
12.5×8= 50×0.4= 45÷0.9= 2.4÷8×0=
0.12+0.8= 0.42÷0.6= 5a+0.9a= 5+0÷5-5=
28.9÷0.25÷0.4
1.14÷1.5×0.8
3.5÷0.4÷0.25
3.4+(0.25+1.6)÷0.25
1.5÷0.3= 36÷0.4= 29.29÷29= 3÷15=
4÷0.25= 0÷19.8= 0.2×0.05= 0.6×1.5=
7-5.2= 7.21+0.53= 6.97-3.97= 15-4.28=
7.9+5.5 = 5.7+0.03= 3.58-2.87= 2.05+8.02=
2.4÷8= 3.5÷7= 0.8÷4= 0.64÷8=
6.3÷0.9= 0.25÷5= 0.84÷2= 4.8÷0.6=