Topic 7Lesson 1 = Subtracting TensLesson 2 = Finding Parts of 100Lesson 3 = Subtracting on a Hundred Chart

Lesson 4 = Adding On to SubtractLesson 5 = Missing or Extra Information

Topic Map

FocusLesson 7.1

Why does only the tens digit change when subtracting tens

from a two-digit number?

Lesson 7.1• Ten-Frames• Subtract• Mental Math• Tens 10, 20, 30, 40…

• Ones 1, 2, 3, 4…

Lesson 7.1

Use little ten-frames to subtract multiples of ten from a two-digit

number.

FocusLesson 7.2

When one part of 100 is known, how can the other

part be found?

Lesson 7.2• Part• Ten-Frames• Subtract• Mental Math• Tens• Ones

Lesson 7.2

Use little ten-frames to model a known part of 100 to find the

missing part.

FocusLesson 7.3

How can a hundred chart be used to subtract two-digit

numbers?

Lesson 7.3

• Ten-Frames• Subtract• Mental Math• Tens 10, 20, 30, 40…

• Ones 1, 2, 3, 4…

Lesson 7.3

Use a hundred chart to find the difference between 2 two-digit

numbers.

FocusLesson 7.4

How can you add-on to find the difference between 2 two-

digit numbers mentally?

Lesson 7.4

• Ten-Frames• Subtract• Mental Math• Tens 10, 20, 30, 40…

• Ones 1, 2, 3, 4…

Lesson 7.4

Use models to find the difference between 2 two-digit numbers.

FocusLesson 7.5

How do you know if there is extra information or missing

information in a problem?

Lesson 7.5

• Ten-Frames• Subtract• Mental Math• Tens 10, 20, 30, 40…

• Ones 1, 2, 3, 4…

Lesson 7.5

Identify extra information and missing information in a problem.