you add 1.3 to 1.3, and get 2.6
78
13x2x5=130
2 times 13 = 26
2 times 13 = 26
They are 11 times 13 = 143
13 times 9= 117
1 x13 =13
5 times 13 times 2 = 2 times 5 times 13 = 10 times 13 = 130
1+3 = 4 but 13 = 1
It is: 13/2 times 2 = 13
150 x 13 = 1950
45 * 13 = 585