在横线上填上“>”“<”或“=” 23.2×0.87 23.2; 23.2×0.87 0.87; 3.6÷0.82 3.6×0.82.
0.8+0.55+1.2-0.45
+-
1--
口算。+= -= += - +=0.63×1000= 0. 75-0.25= 0.07+0.03= 0. 9÷0.03= 0.4×0.8=
×= ÷3=÷= -=3÷15= +0.25=1÷= 85%-15%=10÷10%= 5×÷5×=