Another great idea from a Math Solutions presentation on Making Sense of Fraction Computations:

Tell Me All You Can prompts encourage reasonableness when computing with fractions, and can be used to promote estimation for all computation:

~ The answer is going to be around/about ________________ because _________________________.

~ The answer is going to be close to _______________ because _________________________.

~ The answer is going to be between ____________ and ____________

because _____________________.

~ The answer is going to be greater than ________________ because

____________________.

~ The answer is going to be less than ________________ because

____________________.