Use the addition table to find patterns.
An addition chart is shown. Along the column header are the numbers 1 through 10. Along the row header are the numbers 1 through 10. One number across the column header and one number across the row header are added together. 1 plus 1 equals 2. 2 plus 1 equals 3, etc.
Drag the tiles to answer each question. Tiles may be used more than once.
(1 point)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
What happens when 2 even numbers are added?
What happens when 2 odd numbers are added?
What happens when 1 odd and 1 even number are added?
When 2 even numbers are added, the sum is always an even number.
When 2 odd numbers are added, the sum is always an even number.
When 1 odd and 1 even number are added, the sum is always an odd number.
Will rounding to the nearest 10 or the nearest 100 give a closer estimate of 748−431
?
Explain your answer.
(4 points)
Rounding to the nearest 10 will give a closer estimate of 748−431.
When we round to the nearest 10, we round both numbers to the nearest 10 and then subtract.
Rounding 748 to the nearest 10 gives us 750, and rounding 431 to the nearest 10 gives us 430.
So the estimate is 750 - 430, which equals 320.
On the other hand, if we round to the nearest 100, we round both numbers to the nearest 100 and then subtract.
Rounding 748 to the nearest 100 gives us 700, and rounding 431 to the nearest 100 gives us 400.
So the estimate is 700 - 400, which equals 300.
Therefore, rounding to the nearest 10 gives a closer estimate of 748−431 than rounding to the nearest 100.
John subtracted to find 345−182=163
.
Which number sentence should he write to check his work?
(1 point)
Responses
182+163=___
182 + 163 = ___
345+163=___
345 + 163 = ___
345+182=___
345 + 182 = ___
182−163=___