37×3=111,37×6=222,37×9=333,37×12=,......,37×=666。
30×70= 120÷2= 30×30= 24÷2=
11×90= 77 ÷7= 12×20= 600÷3=
41×10= 400÷5= 60×60= 330÷3=
+ = 50÷50%= = 3 -1.125=
1.9÷2.5÷0.4= ( )×18= = 1- =