Using the Make 10 strategy to subtract ones

Maths

Do you need to use the "Make 10" strategy for the following equation? 13-3=?

What known fact can help you solve the following equation? 15-4=?

Solve the following equation using the "Make 10" strategy: 33-5=?

Solve the following equation by partitioning 1 number: 26+15=

Solve the following equation by partitioning both numbers: 49+25=

Solve the following equation by using any strategy you think makes sense: 28+15=