Question

diagnostic test
add or subtract.

1. 12.7 + 9.4
2. 54.16 + 10.3
3. 62.5 - 14.2
4. 43.8 + 22.17
5. 80.6 - 67.41

ng. brayden bought supplies for his

Explanation:

1. $12.7 + 9.4$

Step1: Align decimal points

$12.7\\
+ \ 9.4$

Step2: Add the numbers

$12.7 + 9.4 = 22.1$

Step1: Align decimal points (add a zero to 10.3 for clarity)

$54.16\\
+ \ 10.30$

Step2: Add the numbers

$54.16 + 10.30 = 64.46$

Step1: Align decimal points

$62.5\\

• \ 14.2$

Step2: Subtract the numbers

$62.5 - 14.2 = 48.3$

Answer:

$22.1$

2. $54.16 + 10.3$