If you take the number 900 and increase its units digit by 7, then what number are you left with?
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If you take the number 900 and increase its units digit by 7, then what number are you left with?
To solve this problem, we'll follow these steps:
Now, let's work through each step:
Step 1: The units digit of 900 is 0.
Step 2: Adding 7 to the units digit gives us 7.
Step 3: The remaining digits (hundreds and tens digits in 900) remain unchanged, so the number becomes 907.
Therefore, the number you are left with after increasing the units digit by 7 is .
What number do the blue squares below represent?
The units digit is the rightmost digit in any whole number. In 900, the units digit is 0. In 345, the units digit would be 5.
Because adding 7 to the entire number is different from adding 7 to just the units digit. We're only changing that one digit position, not the whole number's value.
Great question! If the units digit plus the added number exceeds 9, you'd need to carry over to the tens place. But in this case, , so no carrying is needed.
No! When you're only modifying the units digit, the hundreds and tens digits stay exactly the same. In 900, the 9 and the middle 0 remain unchanged.
Think from right to left: units, tens, hundreds. In 900, reading right to left: 0 is units, 0 is tens, 9 is hundreds.
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