Adding Tens to Tens

Add whole tens the same way you add ones.

10 problems · about 10 minutes · 1.NBT.C.4

NameDate

Figure — use these to answer the problems

Count the rods on each row, then count them all together.

First number

and Second number

Altogether

Tens

Ones

30 + 10 = 40

First number30

Second number10

Figure 1

From earlier lessons. Loosen up before the new work.

4 problems

From “One More, One Less, Ten More, Ten Less”
Ten less than 34 is?
Answer
From “Ten More, Ten Less”
What is ten more than 21?
Answer
3
From “Greater Than, Less Than, Equal To”
What does < mean?
- Is less than.
- Is greater than.
From “Which Is More?”
Which is greater, 30 or 27?
Answer

Straightforward practice. Get the method working first.

3 problems

The same ideas with more to keep track of.

1 problem

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

2 problems