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Grade 1 - Mathematics
6.3 Time, Money, and Estimating
Look at the number. If the last digit or the units digit is 5 or more than 5 we add 1 to the number in the tens place and make the units digit 0.
If the last digit or the units digit is less than 5 then make the units digit 0 and keep the tens digit as it is.
Which would be the best estimate for 108 + 32 = ?
Answer: 110 + 30
Answer the following questions. Also write at least ten examples of your own.
: Which number shows less than $5 but more than $3?
: How often do you celebrate your birthday?
Once a year
Once a week
Once a month
: The game started at 3. We are 15 minutes late. What time did we arrive.
: Which would be the best estimate for 77 + 32= ?
70 + 40
80 + 30
80 + 40
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