SUMA0123456789

123456

234567891011

3456789101112

45678910111213

567891011121314

6789101112131415

78910111213141516

891011121314151617

9101112131415161718

10 + 0 = 1010 + 1 = 1110 + 2 = 1210 + 3 = 1310 + 4 = 1410 + 5 = 1510 + 6 = 1610 + 7 = 1710 + 8 = 1810 + 9 = 1910 + 10 = 20

RESTA1817161514131211109

-998765432108

-898765432107

-798765432106

-698765432105

-598765432104

-498765432103

-398765432102

-298765432101

-19876543210