1305000130500 80万799999 10亿1000000000
260000620000 285408285000 7750000775万
24×5= 92÷4= 750÷50= 2+8×3=
72÷24= 850÷5= 300÷50= 100÷5×2=
387+102= 4.8× = 18.6-5.6= 0.25×39×4=
9.6+0.1= + = 32×125%= ×8+ =