1.NBT.5
Ask your child to mentally (without paper, objects or counting out loud) figure out what 10 more than 43 is. Ask your child to explain how they figured out the answer.
Ask them to do the same thing to find what 10 less than 32 is. Ask your child to explain how they figured out the answer.
Ask them to do the same thing to find what 10 less than 32 is. Ask your child to explain how they figured out the answer.