12.6÷0.312.6×0.3 0.036÷0.010.036×100
方程①=10.5
方程②=1.2
0.99×0.990.99 6.62÷0.246.62
8×0.333.3×0.8 6.3÷3.61
4.4×4= 7.88-0.78= 24.8÷8=
3.8+65= 5+5.05÷5= 1÷4+4=
1.8×0.3÷1.8×0.3= ( )÷0.15=75÷( )