3.7+3=3.7×3 0.9÷1.50.9×1.5
9.99÷0.01999×0.01 0.21×0.210.21÷0.21
8.7-1.75=
0.03×10=
0.72÷0.9=
0.125×0.4=
+=
-=
1-=
3×1.4=
1.56÷0.78=
0.63÷0.7=
10-0.55=
48﹣25=23
综合算式:
63÷7=9