12 : 3 = 4 x 4 = 16
20 x 3 = 60
90 : 1 = 90
123 - 123 = 0
10 x 9 = 90 : 9 = 10
12 - 9 = 3 x 9 = 27
23 - 5 = 18
123 + 12 = 135
1000 - 200 = 800
333 - 111 = 222
\(20.3=60\)
\(90.1=90\)
\(123-123=0\)
\(10.9=\frac{810}{9}=90\)
\(23-5=15\)
\(123+12=135\)
\(1000-200=800\)
\(333-111=222\)