Tens – Tens - TensAdding tens and ones

Primary MathCCS: 2.NBT.5 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction. 2/NBT.8, 2.NBT.9, 2.OA.1

This activity combines adding tens and ones, adding from a hundreds chart and adding using break apart to make tens strategies. Introduce the three anchor charts and leave several copies of the charts at the station for the students to refer to when doing the activity. Extra blank card pages are included for additional teacher creation or differentiation.

What’s included:□ Task Card in WORD (click on slide to open in WORD for editing OR open the separate TASK CARD DOC on the website)□ Activity Sheet□ Anchor Charts□ Student Activity Cards for self or partner directed work□ Answer Key for partner-checking □ Materials Needed: Any type of counters; counting cubes, cm squares, etc., copies of the Challenge Question Answer Sheets. □ Technology Connection

Copyright © 2013 Innovative Educational Programs. Reproduction rights granted to CHILD Teachers and permitted only for use as instructional material.

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STATION TASK CARD ________Station Activity Name: Tens-Tens-Tens Standard: Number and Operations in Base Ten Skill/Objective: (COPY IN YOUR PASSPORT) Adding Tens and Ones Directions:

1. Work independently. 2. You will need activity cards, activity sheet and counting cubes. 3. Shuffle activity cards and place them face down. 4. Pick the top card. 5. Choose a strategy best solves the problem. 6. Write the problem in the column you picked to solve it. 7. Solve the problem using the strategy you chose. If you chose

‘Break Apart to make 10’ you have to show how you broke a number apart. If you chose the ’Hundred Chart’ you have to show the answer on the hundred chart.

8. Ask a person at the table to check your answers. Record the number correct on the Challenge Question Answer Sheet.

Challenge: On the Challenge Question Answer Sheet describe how you would use the ‘Break Apart to make 10” strategy to solve 46 + 37. Show all your work. Reflection: Complete this sentence: I think the easiest strategy to use is . . .

WHEN COMPLETED □ check □ hand in

□ place in folder □ other _________________

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Mental Math – Counting On

• When one addend is less than 10 or a multiple of 10 you can use counting on.

© Innovative Educational Programs

Start at 48 and count on by tens…

48, 58, 68, 78

Mental Math – Break Apart to make a 10

• When adding two addends such as, 36 + 7, you can break apart the number in the ones place to make groups of 10.

© Innovative Educational Programs

36 + 4 = 40

40 + 3 = 43

36 + 7 = 43

Mental Math – Adding on a Hundred Chart

• You can count on by tens in a hundred chart by moving down a column. You can count on by ones in a hundred chart by moving right in a row.

© Innovative Educational Programs

Tens-Tens-Tens Activity Sheet Counting On Break Apart to make 10 Hundred Chart

Tens-Tens-Tens Answer Sheet Counting On Break Apart to make 10 Hundred Chart

52 + 40 =92 25 +8 = 25 + 5 + 3 = 33 48 + 36 = 84

20 + 77 = 97 6 + 37 = 3 + 3 + 37 = 43 37 + 14 = 51

30 + 28 = 58 48 + 4 = 48 + 2 + 2 = 52 52 + 29 = 81

40 + 25 = 65 58 + 5 = 58 + 2 + 3 = 63 68 + 24 = 92

63 + 30 =93 7 + 64 = 1 + 6+ 64 = 71 18 + 55 = 73

49 + 20 = 69 9 + 73 = 2 + 7 + 73 = 82 58 + 37 = 95

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