Students can use the **Spectrum Math Grade 3 Answer Key Chapter 10 Lesson 10.1 Number Patterns** as a quick guide to resolve any of their doubts.

## Spectrum Math Grade 3 Chapter 10 Lesson 10.1 Number Patterns Answers Key

A number pattern can be developed by addition or subtraction.

Complete this pattern by subtraction.

**Complete the pattern by using addition or subtraction.**

Question 1.

2Â Â Â 4Â Â Â Â 6Â Â Â Â

Answer:

Generate the pattern 2 4 6 by using the simple addition with the given numbers by adding 2 for the given series up to the number 12 which is as shown below.

Question 2.

1Â Â Â 3Â Â Â Â 5

Answer:

Generate the pattern 1 3 5 by using the basic addition with the given numbers by adding 2 for the given series up to the number 11 which is as shown below.

Question 3.

20Â Â Â 18Â Â Â 16Â Â Â

Answer:

Generate the pattern 20 18 16 by using the simple subtraction with the given numbersÂ by subtracting 2 in the given series which is as shown below.

Question 4.

21Â Â Â 15Â Â Â 10Â Â Â

Answer:

Generate the pattern 21 15 10 by using the simple subtraction with the given numbers by subtracting which is as shown below.

Question 5.

13Â Â Â 12Â Â Â 11Â Â Â

Answer:

Generate the pattern 13 1 2 11 by using the simple subtraction with the given numbers by subtracting 1Â in the given series which is as shown below.

Question 6.

5Â Â Â Â 10Â Â Â 15Â Â Â

Answer:

Generate the pattern 5 10 15 by using the simple Addition with the given numbers by adding 5 for the given seriesÂ which is as shown below.

Question 7.

3Â Â Â 6Â Â Â Â Â 9Â Â Â Â

Answer:

Generate the pattern 3 6 9 by using the simple Addition with the given numbers by adding 3 for the given series which is as shown below.

Question 8.

20Â Â Â 40Â Â Â 70Â Â Â

Answer:

Generate the pattern 20 40 70 by using the simple Addition with the given numbers which is as shown below.

Question 9.

16Â Â Â 13Â Â Â 10Â Â Â

Answer:

Generate the patternÂ 16 13 10 by using the simple Subtraction with the given numbers by decreasing 3 for the given series which is as shown below.

Question 10.

10Â Â Â 9Â Â Â Â 8Â Â Â

Answer:

Generate the pattern 5 10 15 by using the simple Subtraction with the given numbers by decreasing 1 in the given series which is as shown below.