Grade 1 - Mathematics 6.3 Time, Money, and Estimating

Method:

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.

Example:
Which would be the best estimate for 108 + 32 = ? Answer: 110 + 30 Directions: Answer the following questions. Also write at least ten examples of your own.

Q 1: Which would be the best estimate for 77 + 32= ? 70 + 40 80 + 30 80 + 40

Q 2: The first grade has 11 girls and 9 boys. Two girls were absent on Monday? How many children were present on Monday? 18 22 20

Q 3: How often do you celebrate your birthday? Once a year Once a week Once a month

Q 4: In which month does New Year begin? February July December January

Q 5: The month that Thanksgiving is celebrated in the U.S. is October July November January

Q 6: The game started at 3. We are 15 minutes late. What time did we arrive. 3:15 4:15 5:00

Q 7: Which would be the best estimate for 109 + 38 = ? 130+50 130+50 110+40

Q 8: Which number shows less than $5 but more than $3? $5.36 $4.15 $6.37

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