×
×
= ;
×
= ;
×
×
= ;
×
×
= ;
108×= ;
×
= ;
×
= ;
×120= ;
×
= ;
×
= ;
+
= ;
×
= ;
4×
= ; 2
×
= ; 3
×
×1
= ; 3
×4×
= ;
2×3
×
= ;
×
×
= ; 2
×12= ; 3
×14= ;
5×4= ; 7
×2= ; 3
×4= ; 7×3
= ;
×12
= ;
×6
= ;(
﹣
)×50= ;(
+
)×12= ;
÷
=
÷12= ;
÷
= ; 1÷
= ;
5÷= ;
÷21= ;
÷
= ;
÷
= ;
÷
= ;
÷
= ;
×
= ;
÷5= .
直接写得数:
9.9÷1= 20×1
= 0.36÷
=
﹣
=
÷2= 3
﹣3.05= 1÷
﹣
÷1= 0.5+1
=
÷4=
×12= 6÷
= 27×
=
÷
=
×
= 1÷
=
×
=
÷16
×
=
÷
= 14÷
=
2.47+10.6= 1.5÷0.1=×
= 0.75÷
=
5.6×=
÷
=
﹣
= 31.5×10%=
÷12=
×21×
=
列式计算
①一个数的比它的
多27,这个数是多少?
②与
的差乘30除15的商,积是多少?
③一个数的80%比45的多5,这个数是多少?