What is 23 hundreds + 60 tens + 35 ones=

First you have to convert the numbers to standard form. This is how:

23 * 100 = 2,300

60 * 10 = 600

35 * 1 = 35

Now solve the equation with the numbers in standard form:

2,300 + 600 + 35 =

2,900 + 35 =

2,935