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May 2012

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The ideas in this addition lesson are taken from Add & Subtract 3 ebook. Only a few examples of each problem type are shown; you should make more problems of each kind for the student.

Carrying to tens and to hundreds
Free lesson plan from HomeschoolMath.net

hundreds 1		tens 1	ones
	1	4	5
+		7	9
	2	2	4

100
40
5

70
9

100
110
14

200
20
4

Ones make a ten and over. The tens make one hundred and more.
You have to carry to the tens and to the hundreds. You have to carry two times.

Circle ten ones to form a 10-pillar. Then circle ten ten-pillars to form a new hundred. Notice how the tens' column ends up having no tens in the answer.

hundreds 1		tens 1	ones
	1	6	6
+	1	3	8
	3	0	4

100
60
6

100
30
8

200
90
14

300
0
4

Example problems

1. Follow the example. Add and break down as needed.

Two numbers to add.				Add hundreds. Add tens. Add ones.		Break down to hundreds, tens, and ones		Count hundreds. Count tens. Count ones.
300 60 6	+	200 70 8	=	500 130 14	=	500 100 + 30 10 + 4	=	600 40 4

Two numbers to
add.

Add hundreds.
Add tens.
Add ones.

Break down to
hundreds, tens,
and ones

Count hundreds.
Count tens.
Count ones.

700

100

____

___ + ___

____

600

100

____

___ + ___

____

2. Add. Carry two times if necessary.

704
+	156

260
+	341

248
+	376

173
+	646

493
+	348

3. Word problems. Write mathematical sentence(s) for each.

a) The family is making vacation plans. They plan to drive from home to Wibbleton, which is 214 miles, then from Wibbleton to Wobbleton, which is 178 miles, and then from Wobbleton to home, which is 321 miles. Draw a picture of the trip.

How many miles total would the family drive?

f) You need 110 beads to make a short necklace and 170 beads to make a long one. You have 600 beads. How many and what kind of necklaces can you make?

g) One side of the property is 156 yards and another side is 272 yards. The property is a rectangle in shape. How long a distance do you walk if you go all around it once?

What numbers are missing from the additions?

		3
+	1		9

	3	9	1

	2
+		3	6

	5	1	7

	1	6	9
+		5

	7		4

		8	8
+	7

	9	0	0

New! Times Tales is now on DVD!

The fast, FUN, and easy way to learn multiplication. Learn the upper times tales in two sittings using mnemonic stories.

Carrying to tens and to hundreds Free lesson plan from HomeschoolMath.net

Example problems

Carrying to tens and to hundreds
Free lesson plan from HomeschoolMath.net