Addition
11+88=99
Addition combines two quantities into a total. Here you add 11 and 88 by summing ones and tens, which gives 99. Line the numbers up by place value and carry when a column exceeds nine.
Addition
Addition combines two quantities into a total. Here you add 11 and 88 by summing ones and tens, which gives 99. Line the numbers up by place value and carry when a column exceeds nine.