Adding by Tens
Practice adding two-digit numbers by tens using various strategies, including number lines and mental math.
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Adding by Tens
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Show your work when necessary.
1. When you add 10 to a number, the digit in the tens place will by one.
2. Adding 10 to 35 gives you .
3. If you start at 50 and add 10 three times, you will land on .
Use the number line below to solve 23 + 20.
Answer:
1. Which number comes next in the pattern: 15, 25, 35, ?
36
40
45
50
2. What is 62 + 30?
65
82
92
95
1. 40 + 10 =
2. 75 + 20 =
3. 18 + 30 =
1. Adding 10 to any number always makes it an even number.
True
False
2. To add 40 to a number, you can add 10 four times.
True
False
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