657657×0.8 1.8÷0.61.8
4.3×0.991.01×4.3 5.7×15.7×(0.6+04)
3.8×0.1= 47÷0.01= 420÷16= 3.9÷3÷13=
2.3-0.97= 1.35+0.7= 1.5×4= 1.25×0.8÷1.25×0.8=
A(2,8) B(1,5) C(7,6)