Split the numbers $88+11$ and add.

Split the numbers $42+22$ and add.

Add the numbers $56+13$  by using the hundreds chart.

Add the numbers $35+20$  by using the hundreds chart.

Add the numbers $61+27$ by using the hundreds chart.

Add the numbers $54+32$ by using the hundreds chart.

Add the numbers $19+44$ by using the hundreds chart.

Calculate the numbers $256+538$ by estimating them to the nearest hundreds and compare them with the actual sum.

Calculate the numbers $601+241$ by estimating them to the nearest hundreds and compare them with the actual sum.