直接写得数= == == == == == == ==
口算． 18×3= 250×3= 0×700= 140×7= 99×1= 18×20= 17×4= 340﹣70= 230×4=
用竖式计算． 308×52 45×690 305×30 280×55 27×143 490×400．
竖式计算 508×26= 306×240= 256×19= 365×24= 48×237= 480×36=
列竖式计算． 42×208= 177×65= 54×250=
= 
=
= 
=
= 
=
= 
=
= 
=
= 
=
= 
=
=
粤公网安备 44130202000953号