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# Adding whole numbers kori (1)

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### Adding whole numbers kori (1)

2. 2. Objectives 6C1a – Students will be able to add whole numbers ( use up to three addends with no more than 4 digits in each addend and whole numbers)
4. 4. AddendsHow many addends are in these problems? 527 681 +786 This problem has three addends 183 517 21 + 5 This problem has four addends
5. 5. Adding Whole Numbers How do we add whole numbers with two or more addends? 2864 345 +436 ?
6. 6. Adding Whole Numbers One way to solve this problem is to use the associative property.o Associative property: when adding numbers, the grouping of numbers does not affect the result. This addition problem could be solved like this: 2864 345 +436 Or like this: 436 2864 +345 No matter which way you solve the problem you will end up with the same sum.
7. 7. Adding Whole Numbers The associative property can be used in order to find the sum of the numbers. Let’s take a closer look: 2864 345 +436 First add the ones column: 6+4=10 5+0=5 10+5=15 Since the answer is 15 we will have to regroup by putting the 5 in the ones place and carrying the 1 to the ten column.
8. 8. Adding Whole Numbers Next we move to the tens column: 1 2864 345 +346 5 6+4=10 4+1=5 10+5=15In this case we need to regroup. We will put the 5 in the tens place and carry the 1.
9. 9. Adding Whole Numbers After the tens we move to the hundreds place: 1 2864 345 +436 55 4+1=5 8+3=11 11+5=16 Once again we need to regroup. We will put the 6 in the hundreds place and carry the 1 to the thousands place.
10. 10. Adding Whole Numbers Now we move to the thousands place: 1 2864 345 +436 655 2+1=3 Now we put the 3 in the thousands place and we have solved the problem. 2864 345 +436 3655
11. 11. Try This: 7121 +321 7442 ones:1+1=2 tens:2+2=4 hundreds:3+1=4thousands:7+0=7
12. 12. Try This: 4562 421 + 20 5003 5813 1270 +532 7615