The correct option is C Both options a and b
70 tens = 70 times 10
70 times 10 = 700
700 = 700 times 1
700 times 1 = 700 ones
So, 70 tens = 700 ones
Also,
70 tens = 70 times 10
70 times 10 = 700
700 = 7 times 100
7 times 100 = 7 hundreds
So, 70 tens = 7 hundreds