Draw to Represent 3-Digit Addition. 3 hundreds 3 tens 7 ones. Draw quick pictures. Write how many hundreds, tens, and ones in all. Write the number.
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1 Lesson. Reteach Draw to Represent Digit Addition Add and. Draw quick pictures of and. Count the hundreds, tens, and ones. hundreds tens ones Write the number. Draw quick pictures. Write how many hundreds, tens, and ones in all. Write the number.. Add and. hundreds tens ones. Add and. hundreds tens ones Reteach
2 Lesson. Enrich Addition Triplets One addend is in standard form, but the other is missing! Draw a quick picture to find the unknown addend Writing and Reasoning How did you decide what to draw for Exercise? Explain. Enrich
3 Lesson. Reteach Break Apart Digit Addends _ Break apart each addend. Write the value of each digit. = 00 0 = 00 0 Add the hundreds, tens, and ones. Then add these sums together = 8 Break apart the addends to find the sum.. _ = Reteach
4 Lesson. Enrich Domino Break Each set of dominoes shows a digit addend on top and another on the bottom. Break apart the addends to find the sum Writing and Reasoning Draw your own set of dominoes to show digit addition. Give it to a classmate to solve. 8 Enrich
5 Lesson. Reteach Digit Addition: Regroup Add. 8 _ B 8 Add the ones. 8 = Do you need to regroup? yes Regroup 0 ones as ten. B 8 Add the tens. = Add the hundreds. = B Write the sum... B B 9 Reteach
6 Lesson. Enrich Digit Scramble Use each digit once to make two addends for a problem in which you regroup ones. Solve..,,,,,.,,,,, 9.,,,,,.,,,,, Writing and Reasoning How did you make sure you would need to regroup ones? 0 Enrich
7 Lesson. Reteach Digit Addition: Regroup Add. 8 _ Add the ones. 8 = 9 B B 8 9 Add the tens. = Do you need to regroup? yes Regroup tens as hundred tens. B B 8 9 Add the hundreds. = B B 8 9 Write the sum... B B B 0 B Reteach
8 Lesson. Enrich Triple Digits Use the numbers on the shirts to make an addition problem in which you regroup tens. Write the sum Writing and Reasoning Write your own digit addition problem in which you regroup tens. Give it to a classmate to solve. Enrich
9 Lesson. Reteach Addition: Regroup and Sometimes, you may need to regroup more than once. 89 _ Step Add the ones. There are ones in all. Regroup ones as ten ones. Step Add the tens. There are tens in all. Regroup tens as hundred ten. Step Add the hundreds. There are 8 hundreds in all Write the sum Reteach
10 Lesson. Enrich Paint by Regrouping Find each sum. Color the problem blue if you regrouped twice. Color the problem green if you regrouped once. Color the problem yellow if you did not regroup Writing and Reasoning Why do you sometimes need to regroup in digit addition problems? Enrich
11 Lesson. Reteach Problem Solving Digit Subtraction There were books on the shelves. Mr. Davies took books off the shelves. How many books were still on the shelves? Unlock the Problem What do I need to find? how many books were still on the shelves What information do I need to use? There were books on the shelves. Mr. Davies took books off the shelves. Show how to solve the problem. There were books still on the shelves. Make a model to solve. Then draw a quick picture of your model.. Mr. Cho has pencils. Then he sells pencils. How many pencils does he have now? pencils Reteach
12 Lesson. Enrich What Is the Difference? Use the information on the farmer s list to write and solve the subtraction problem.. How many more oranges than apples are there?. How many more bananas than pears are there?. How many more roses than lilies are there?. How many more daisies than violets are there? more oranges more bananas more roses more daisies Writing and Reasoning Use the list to write your own subtraction problem. Have a classmate solve it. Enrich
13 Lesson. Reteach Digit Subtraction: Regroup Subtract. Are there enough ones to subtract? no Regroup ten as 0 ones. BB There are ones and tens. Subtract the ones. = BB Subtract the tens. = Subtract the hundreds. = BB Solve. Write the difference... 8 BB 8 BB 8 Reteach
14 Lesson. Enrich Subtraction Steps Solve each subtraction problem B B Writing and Reasoning Write your own digit subtraction problem that has no regrouping. 8 Enrich
15 Lesson.8 Reteach Digit Subtraction: Regroup Subtract. Subtract the ones. = Are there enough tens to subtract tens? no Regroup hundred as 0 tens. BBB Now there are tens and hundreds. Subtract the tens. = Subtract the hundreds. = BBB Solve. Write the difference... BBB 9 9 BBB 9 Reteach
16 Lesson.8 Enrich Check It Out Solve the subtraction problem. Then complete the addition problem to check your work... 9 / / Writing and Reasoning Why can you use addition to check your subtraction? 0 Enrich
17 Lesson.9 Reteach Subtraction: Regroup and You may need to regroup more than once _ Regroup ten as 0 ones. Subtract the ones Regroup hundred as 0 tens. Subtract the tens Subtract the hundreds Solve. Write the difference Reteach
18 Lesson.9 Enrich Subtraction Squares Start at the top right circle. Subtract to find the missing number in each circle.. 8 = 8 = = 89 =. 9 = 8 = = 9 = Writing and Reasoning How is regrouping in subtraction different from regrouping in addition? Enrich
19 Lesson.0 Reteach Regrouping with Zeros Subtract 8 from 0. There are not enough ones to subtract 8. Since there are 0 tens, regroup hundreds as hundreds 0 tens. 0 / 0 / 8 Then regroup 0 tens ones as 9 tens ones. Subtract the ones. 8 = / 8 Subtract the tens. 9 = Subtract the hundreds. = So, 0 8 = Solve. Write the difference Reteach
20 Lesson.0 Enrich Mystery Number Subtract to find each difference. Color the box for each difference with a in the hundreds place to discover the mystery number Writing and Reasoning What is the mystery number? When do you need to regroup hundreds in a subtraction problem? Enrich
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