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Cogito

Grade 1 Math · Chapter 4 · Lesson 6

Practice Worksheet

One More, One Less to Twenty

Keep going past ten, including the tricky bit at 19.

10 problems · about 11 minutes · 1.NBT.A.1

NameDate

Figure — use these to answer the problems

Hop along. Watch carefully when you get to 19.

Marker14

Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

4 problems

From “Breaking Teen Numbers Apart”
12 is 10 and what?
Answer
From “Writing Teen Numbers”
In 16, how many ones are there?
Answer
From “Saying It the Ten Way”
Ten five is which number?
Answer
From “Ten and Some More”
10 + 2 = ?
Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

One more than 11?
Answer
One less than 20?
Answer
One more than 13?
Answer

Build It Up

The same ideas with more to keep track of.

1 problem

One less than 16?
Answer

Stretch Yourself

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

2 problems

One more than 19?
Answer
Marbles
Leo has 17 marbles. He finds 1 more. How many now?
Answermarbles