Binary Subtraction:

Problem $1$:

${34}^{10}$

${10}^{10}$

Problem $2$:

${67}^{10}$

${40}^{10}$

Problem $3$:

$8910$

$6710$

Problem $4$:

${78}^{10}$

${90}^{10}$

Problem $5$:

${87}^{10}$

${88}^{10}$

Problem $6$:

${14}^{10}$

${36}^{10}$