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Cogito

Grade 1 Math · Chapter 7 · Lesson 7

Practice Worksheet

Ten More, Ten Less

Add or take ten without counting one by one.

10 problems · about 12 minutes · 1.NBT.C.5

NameDate

Figure — use these to answer the problems

Tap "Ten more" and look at the square you came from.
Numbers 1 to 40, ten in each row. 23 is chosen.
Chosen number23
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

4 problems

  1. From “Greater Than, Less Than, Equal To”

    What does < mean?

    • Is less than.
    • Is greater than.

  2. From “Which Is More?”

    Which is greater, 30 or 27?

    Answer

  3. From “Many Ways to Show a Number”

    2 tens and 16 ones is which number?

    Answer

  4. From “Multiples of Ten”

    Three tens is which number?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. What is ten more than 21?

    Answer

  2. Which digit changes when you add ten?

    • The tens digit.
    • The ones digit.

  3. What is ten more than 14?

    Answer

Build It Up

The same ideas with more to keep track of.

1 problem

  1. What is ten less than 36?

    Answer

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

2 problems

  1. What is ten more than 30?

    Answer

  2. A Bag of Marbles

    Leo has 27 marbles. He wins ten more. How many now?

    Answermarbles