“小红买了5本数学绘本,( ),一共用去多少元?”
7×4= 21+3= 5×5= 2×2=
5×9= 4×4= 99-26= 5×1=
3×5= 20-8= 6×2= 2×3=
9+3= 5×6= 9×3= 7×5=
①47+52-18=
②89-34-17=
③37+44-29=
列式: