Find the missing numbers

Subject: Re: grade 5 math homework

Hi,

my name is Bonnie I am having trouble assisting my son with his grade 5 math please help.
I must find the missing numbers and function rules

n	output
7	10
12	20
39	40
24	30
16	b
87	c

we are totally confused can someone help

Hi Bonnie,

There can be many answers to such a question but I suspect that the teacher wants you to notice that all the outputs are multiples of 10 'one higher' than the number itself.

7 --> 10
12 --> 20
24 --> 30
39 --> 40

so I would say that

16 --> 20

87 --> 90

Hope this helps.
Denis

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