round my numbers rounding to estimate multiplication intermediate math ccss: 4.nbt.3 use place value...
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Round My Numbers
Rounding to Estimate MultiplicationIntermediate MathCCSS: 4.NBT.3 Use place value understanding to round multi-digit whole numbers to any place. 4.OA.3 . . . Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
Additional Information for teacher about activity: This activity is a game type activity, however, it could be used as an individual practice activity. An activity sheet has been included to work independently.
What’s included:□ Task Card in WORD□ Anchor Chart□ Activity Sheet – for individual work □ Student Activity Cards for partner directed work□ Answer Key for self-checking □ Materials Needed: Challenge Question Answer Sheets□ Technology Connection: http://www.ixl.com/math/grade-4
Copyright © 2013 Innovative Educational Programs. Reproduction rights granted to CHILD Teachers and permitted only for use as instructional material. www.ieponline.com
STATION TASK CARD ____________ Station Activity Name: Round My Numbers Standard: Number and Operations in Base Ten Skill/Objective: (COPY IN YOUR PASSPORT) Estimating to Multiply Directions:
1. Work in a group of 2-3 partners. 2. You will need a set of cards. 3. Shuffle cards and place face down. 4. Tallest partner goes first. 5. Pick a card, read it aloud and answer. Use the anchor chart to
help you solve the problems. 6. Partner to the left checks the answer. 7. If correct keep the card. If not correct, place the card at the
bottom of the pile. 8. Take turns until all cards are gone. 9. Write the number of cards you have on the Challenge Question
Answer Sheet. Challenge: Write your answer on a Challenge Question Answer Sheet. Multiply 3,645 x 23. Show your answer and describe whether your answer is reasonable or not. Prove it! Reflection: Why do you have to check your answers to estimating multiplication to be sure it is reasonable? Give examples of reasonable and unreasonable answers.
WHEN COMPLETED □ check □ hand in
□ place in folder □ other _________________
Intermediate Math
Copyright ©
2013 Innovative Educational Programs. Reproduction rights granted to CH
ILD Teachers and perm
itted only for use as
instructional material. w
ww
.ieponline.com
Rounding to Estimate Multiplication
• Problem: 73 x 58 = ?
Copyright © 2013 Innovative Educational Programs.
73 rounds to 70
58 rounds to 60
70 x 60 = 4200
So, 73 x 58 is approximately
4200
22 x 19 =
1 2 3
4 5 6
7 8 9
35 x 28 = 73 x 83 =
65 x 32 = 34 x 38 = 15 x 26 =
47 x 58 = 52 x 84 94 x 27 =
77 x 22 =
10
11
12
13
14
15
16
17
18
68 x 71 = 13 x 23 =
94 x 37 = 52 x 88 = 33 x 15 =
35 x 21 = 11 x 58 =46 x 66 =
Number Answer
1Approximately
400
2 Approximately
1200
3Approximately
5600
4Approximately
2100
5Approximately
1200
6 Approximately
600
7 Approximately
3000
8Approximately
4000
9 Approximately
2700
Number Answer
10Approximately
1600
11Approximately
4900
12Approximately
200
13Approximately
3600
14 Approximately
4500
15 Approximately
600
16Approximately
800
17 Approximately
3500
18 Approximately
600
Answer Key for Round My Numbers
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Worksheet for Round My NumbersName ______________________ Date _______________
Copyright © 2013 Innovative Educational Programs.
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