80个米相加是多少米?
×10= ÷= ÷80%=8×12.%= ×0×= ﹣=0.5+= ×= ÷3=(﹣)×=
口算.×= += ×== = ×5=÷2= ﹣=
口算.0.75+= 0÷= ×= +20%=30÷= ×12×= 63:27= :=
直接写出得数.= = = = == = = = =
直接写出得数:2.4×= ; = ; :0.75= ; ÷ =0.1;0.180%×= ; 32÷(1+60%)= ; 2﹣1= ; ×40=.