• The number 1081 is between ,920 and 1150,
,
• So the quotient is between ,40 and 50.
,
• Because 1,081 is closer to ,1150 than to 920,, Roger knows that the quotient is closer to ,50 than to 40.
,
• The best estimate for the quotient is ,50,.
,
• The actual quotient is ,47,.