A student asked me-
3 tens and 5 ones= 2 tens and ? Ones
And the answer is 15 ones but how 15 ones
3 tens and 5 ones = 30 + 5 = 35
35 - 20 = _______
3 tens and 5 ones= 2 tens and ? Ones
And the answer is 15 ones but how 15 ones
35 - 20 = _______