2.5÷10%=
1-11%=
80×55%=
6×3.14=
15.07-5.7=
42÷42%=
×44= 5-= ×= ×12=
-= ×= ×0.36= ×=
×= 1.8×= ×= ×=
×= ×24= 2.4×= ×0=
×2= ×12= ×= ×=
×= = = =
×24= 1.8×= ×= ×10=