Subtract and check your answer by addition:

$\begin{array}{ccc}& \mathrm{T}& \mathrm{O}\\ & 6& 7\\ -& 4& 9\\ & & \end{array}$     $\begin{array}{ccc}& \mathrm{T}& \mathrm{O}\\ & & \\ +& & \\ & & \end{array}$

 

 

 

Subtract and check your answer by addition:

$\begin{array}{ccc}& \mathrm{T}& \mathrm{O}\\ & 9& 4\\ -& 5& 9\\ & & \end{array}$      $\begin{array}{ccc}& \mathrm{T}& \mathrm{O}\\ & & \\ +& & \\ & & \end{array}$

Sonia counted $17$ butterflies in a garden. She counted $25$ butterflies in another garden. How many butterflies did Sonia count in all $?$

Rekha bought $47$ pastries from the bakery. She and her friends ate $19$ pastries. How many pastries does she have left$?$ $\_\_\_\_\_\_\_$pastries.

A kite seller had $21$ red, $22$ purple, and $17$ green kites. How many kites did he have in all?

Rohan has $45$ crayons and his brother Shiv has $29$ crayons. Who has less crayons and by how much$?$ _____ has _____less than _____.

Find the sum of $45$ and $19$. What number can you add to either $19$ or $45$ so that your calculation becomes easier$?$ Will you have to subtract the same number from the answer you get$?$