problem 22: fill in the missing number.

__÷5 = 9?

predict: I predict I will need to use multiplication in his sum.

clarify: there are no words, sentences or phrases that I need to clarify.

find the big question: what is the missing number?

solve:

this problem was very simple to do.

first I worked out what 9×5 was, and that was 45!

to double check, 45÷5=9!

the answer is 45.

summary: in this problem the mathematicians toolbox strategy I used was use my prior knowledge.