Question

Jonas wrote 9+8 =17 what number sentence shows the commutative property of addition

Answer 1

Jonas write the number 9 + 8 = 17
commutative property is the property that is related the moving of numbers. for addition it is a + b = b + a 
so we can write the expression 9 + 8 = 17 as 8 + 9 = 17 
in this 9 + 8  and 8+9 shows the commutative property of addition.