What is 423 rounded to the nearest hundred? 3.1 Count Equal Groups Problem of the Day: What is 423 rounded to the nearest hundred? A) 430 B) 420 C) 400 D) 300

Equal groups have the same number of objects in each group. 3.1 Count Equal Groups Equal groups have the same number of objects in each group. Matchbox cars were invented in 1952. Tim has 6 Matchbox cars. Each car has 4 wheels. How many wheels are there in all? Activity: Use counters to model the equal groups.

Step 1: Draw 4 counters in each group. 3.1 Count Equal Groups Step 1: Draw 4 counters in each group. Step 2: Skip count to find how many wheels in all. Skip count by 4s until you say 6 numbers. ___ ___ ___ ___ ___ ___

There are ___ groups with ____ wheels in each group. 3.1 Count Equal Groups There are ___ groups with ____ wheels in each group. So, there are ____ wheels in all.

Example: Count equal groups to find the total. Sam, Kyla, and Tia each have 5 pennies. How many pennies do they have in all? How many pennies does each person have? How many equal groups of pennies are there?

Draw 5 counters in each group. 3.1 Count Equal Groups Sam, Kyla, and Tia each have 5 pennies. How many pennies do they have in all? Draw 5 counters in each group. Think: There are ___ groups of 5 pennies. Think: There are ____ fives. 5

You can use place value to add two addends. Example 1: Add. 236 + 585 Estimate. 200 + 600 = ___.

You can use place value to add two addends. Example 1: Add. 236 + 585 Step 1: Add the ones. Regroup the ones as tens and ones. 236 + 585

You can use place value to add two addends. Example 1: Add. 236 + 585 Step 2: Add the tens. Regroup the tens as hundreds and tens. 236 + 585 1

You can use place value to add two addends. Example 1: Add. 236 + 585 Step 3: Add the hundreds. 236 + 585 21

So, Dante flies _____ miles. 1.7 Use Place Value to Add 236 + 585 = ______ So, Dante flies _____ miles. Since _____ is close to the estimate of _____, the answer is reasonable. You can also use the Commutative Property of Addition to check your work. Change the order of the addends and find the sum. 585 + 236

Try This! Find 563 + 48 in two ways. 1.7 Use Place Value to Add Try This! Find 563 + 48 in two ways. Estimate: 600 + 50 = ____ A) Use the break apart strategy. 563 = 500 + ___ + ___ + 48 = 40 + ___ B) Use place value. 563 + 48

Use place value to add three addends. A) Add. 140 + 457 + 301 Estimate: 100 + 500 + 300 = ____ Step 1: Add the ones. 140 457 + 301 Step 2: Add the tens. 8

Use place value to add three addends. Estimate: 100 + 500 + 300 = ____ Step 3: Add the hundreds. 140 457 + 301 98 So, 140 + 457 + 301 = ____

Use place value to add three addends. B) Add. 173 + 102 + 328 Estimate: 200 + 100 + 300 = ____ Step 1: Add the ones. Regroup the ones as tens and ones. 173 102 + 328 Step 2: Add the tens. Regroup the tens as hundreds and tens. 3

Use place value to add three addends. Step 3: Add the hundreds. 173 102 + 328 03 So, 173 + 102 + 328 = ____

1.7 Use Place Value to Add Circle the problem in which you need to regroup. Use the strategy that is easier to find the sum. a. 496 + 284 b. 482 + 506 Share & Show

Estimate. Then find the sum. 2) Estimate: ____ 251 + 345 1.7 Use Place Value to Add Estimate. Then find the sum. 2) Estimate: ____ 251 + 345 Share & Show

Estimate. Then find the sum. 3) Estimate: ____ 479 + 395 1.7 Use Place Value to Add Estimate. Then find the sum. 3) Estimate: ____ 479 + 395 Share & Show

Estimate. Then find the sum. 4) Estimate: ____ 686 + 314 1.7 Use Place Value to Add Estimate. Then find the sum. 4) Estimate: ____ 686 + 314 Share & Show

Estimate. Then find the sum. 5) Estimate: ____ 231 410 + 158 1.7 Use Place Value to Add Estimate. Then find the sum. 5) Estimate: ____ 231 410 + 158 Share & Show