Grade 2 | MATHEMATICS
WEEK 16 • STUDENT TEXTBOOK • DAYS 76–80
Read each lesson with a parent or teacher and study the worked example. Then answer the questions for that day in the Week 16 Practice Workbook.
Week 16 Student Textbook | Week 16 Practice Workbook | Week 16 Teacher Guide | Week 15 Student Textbook | Grade 2 index
Day 76: Repeating Patterns
A repeating pattern has a part that repeats again and again in the same order. In red, yellow, red, yellow, the part that repeats is red, yellow.
To copy a pattern, use the same objects in the same order. To extend it, find the part that repeats and keep going. Say the pattern aloud to hear where it starts again.
Worked example: What comes next? clap, stomp, clap, stomp, clap
- The part that repeats is clap, stomp.
- The pattern ends on clap, so stomp comes next.
Worked answer: stomp
Day 77: Number Patterns
A number pattern changes by the same amount each time. To find the rule, look at what happens from one number to the next. In 10, 20, 30, 40, each number is 10 more, so the rule is add 10.
Some patterns count back. In 50, 45, 40, each number is 5 less, so the rule is subtract 5. Check your rule on every pair of numbers before you extend the pattern.
Worked example: What is the rule? 2, 4, 6, 8
- From 2 to 4 is 2 more. From 4 to 6 is 2 more. From 6 to 8 is 2 more.
- Each number is 2 more than the one before.
Worked answer: Add 2 each time.
Day 78: Make a Pattern and Describe Its Rule
A pattern rule tells exactly how a pattern works. For a repeating pattern, the rule names the part that repeats. For a number pattern, the rule tells how much to add or subtract each time.
When you make a pattern for someone else, it must follow its rule every time. If one part is out of place, your helper cannot tell what comes next.
Worked example: A pattern is block, ball, block, ball. What is the part that repeats?
- Say it aloud: block, ball, block, ball.
- It starts again after ball.
Worked answer: block, ball
Day 79: Mixed Review: Facts, Time and Money
Mental strategies help you add and subtract within 20 quickly. Make a ten, use doubles, or think of a related addition fact to subtract. For 13 – 5, think 5 + 8 = 13, so 13 – 5 = 8.
Remember time and money too. The short hand shows the hour and the long hand shows the minutes. A quarter is 25¢, a dime is 10¢, a nickel is 5¢ and a penny is 1¢. Count coins from the largest value to the smallest.
Worked example: Solve 9 + 5 by making a ten.
- Take 1 from the 5 and give it to the 9: 9 + 1 = 10.
- Add the 4 that is left: 10 + 4 = 14.
Worked answer: 14.
Day 80: Independent Check: Cumulative Review
Today you will answer on your own.
Use what you learned this year: place value, adding and subtracting within 1000, measuring length, time, money and shapes.
Worked example: What is the value of the 3 in 362?
- The 3 is in the hundreds place.
- 3 hundreds is 300.
Worked answer: 300.
Week 16 Student Textbook | Week 16 Practice Workbook | Week 16 Teacher Guide | Week 15 Student Textbook | Grade 2 index
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