9=1×9
108=12×9
11106=1234×9
=123456×9
=1234567×9
=12345678×9
=123456789×9
81=9×9
882=98×9
8883=987×9
88884=9876×9
=987654×9
88888887=
952÷28= 508×26= ★240×35=
453÷36= 980÷50= ★726÷24=
+ = 1- = 1.25× = - =
0.9+99×0.9= 0÷ = 1÷ = -0.5=
0.6×101= 3.2×2.5×12.5=