Question

marcus estimates the 230 people will attend choir cncert. there was an actual total of 300 people who attenede the choir concert

Answer 1

so find the difference between predicted number and actual number

predicted number=230
actual number=300
300-230
an easy way to subtract is to remember that 300=100+200 and 230=200+30 so we rearrange and get
100+200-(200+30)
100+200-200-30
100+0-30
100-30
70
difrence is 70