Practice with the help of Spectrum Math Grade 5 Answer Key Chapter 3 Lesson 3.1 Adding Decimals to Tenths regularly and improve your accuracy in solving questions.

Align decimal points.

Question 1.
a.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum as 0.9

b.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum as 2.4

c.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum as 2.7

d.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum as 9.8

Question 2.
a.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum as 10.2

b.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum as 8.6

c.

We can see that the given decimals are unlike, so we will convert them to like decimals by adding the required number of zeros. We will count the number of digits after the decimal point in both numbers and identify the higher one in them.
Here, in this case, we put zero on the left side.

Therefore, after adding the decimals, we get the sum of 18.6

d.

We can see that the given decimals are unlike, so we will convert them to like decimals by adding the required number of zeros. We will count the number of digits after the decimal point in both numbers and identify the higher one in them.
Here, in this case, we put zero on the left side.

Therefore, after adding the decimals, we get the sum as 23.1

Question 3.
a.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum as 1.3

b.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum as 100.4

c.

We can see that the given decimals are unlike, so we will convert them to like decimals by adding the required number of zeros. We will count the number of digits after the decimal point in both numbers and identify the higher one in them.
Here, in this case, we put zero on the left side.

Therefore, after adding the decimals, we get the sum of 46.6

d.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum of 45.7

Question 4.
a.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum of 550.5

b.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum of 110.9

c.

We can see that the given decimals are unlike, so we will convert them to like decimals by adding the required number of zeros. We will count the number of digits after the decimal point in both numbers and identify the higher one in them.
Here, in this case, we put zero on the left side.

Therefore, after adding the decimals, we get the sum of 562.0

d.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum of 113.3

Question 5.
a.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum as 0.4

b.

If we observe the given decimals, we see that they are like decimals, so, we will place them in order and do the regular addition.

Therefore, after adding the decimals, we get the sum as 1.7

c.

We can see that the given decimals are unlike, so we will convert them to like decimals by adding the required number of zeros. We will count the number of digits after the decimal point in both numbers and identify the higher one in them.
Here, in this case, we put zero on the left side.

Therefore, after adding the decimals, we get the sum as 42.2

d.

We can see that the given decimals are unlike, so we will convert them to like decimals by adding the required number of zeros. We will count the number of digits after the decimal point in both numbers and identify the higher one in them.
Here, in this case, we put zero on the left side.

Therefore, after adding the decimals, we get the sum of 72.2

Question 6.
a.

We can see that the given decimals are unlike, so we will convert them to like decimals by adding the required number of zeros. We will count the number of digits after the decimal point in both numbers and identify the higher one in them.
Here, in this case, we put zero on the left side.

Therefore, after adding the decimals, we get the sum as 151.3

b.

We can see that the given decimals are unlike, so we will convert them to like decimals by adding the required number of zeros. We will count the number of digits after the decimal point in both numbers and identify the higher one in them.
Here, in this case, we put zero on the left side.

Therefore, after adding the decimals, we get the sum as 466.5

c.