When you add or subtract decimals, you must line up the decimal points.

Question

When you add or subtract decimals, you must line up the decimal points. 
*
1 point
true
false
3. Find the sum   34.25 + 7.46
*
1 point
4.171
41.71
417.1
4171
4. Find the difference  124.15 - 52.3
*
1 point
7.185
71.85
718.5
7185
5.  Jamal went to visit his grandmother for a week during the
summer. When he arrived, he noticed that there was already
2.2 inches of rain in her rain gauge. If it rained 0.6 inches
every day he was there, what was the total amount of rain
inside the rain gauge? (Remember, there are 7 days in a week)
*
2 points
1.32 inches
2.8 inches
4.2 inches
6.4 inches

GPT-4o mini · Answer

1. True - When you add or subtract decimals, you must line up the decimal points. 3. To find the sum of 34.25 + 7.46: ``` 34.25 + 7.46 ------- 41.71 ``` The answer is **41.71**. 4. To find the difference of 124.15 - 52.3, first line up the decimal points: ``` 124.15 - 52.30 -------- 71.85 ``` The answer is **71.85**. 5. To calculate the total amount of rain in the rain gauge: Initial rain = 2.2 inches Rain per day = 0.6 inches Number of days = 7 Total rain from days = 0.6 inches/day * 7 days = 4.2 inches Total amount of rain = Initial rain + Total rain from days = 2.2 inches + 4.2 inches = 6.4 inches The answer is **6.4 inches**.