Let’s Learn!
Add two-digit numbers.
Goal:
Goal:
Think About It!
Goal: How can we add without a place-value chart?
There are 35 monkeys swinging on vines! There are 23 monkeys on the ground. How many monkeys are there in total? Let’s add to find out!
35 + 23 = __
35
Put 35 under the addition sentence.
35 + 23 = __
35
23
Put 23 under 35.
35
23
Tens place
Ones place
Are the digits lined up? Make sure the digits in the ones place and tens place match.
35
23
_____
+
Put a line under the addends. Put a plus sign on the left of the addends.
35
23
_____
8
+
Add the digits in the ones place.
35
23
_____
58
+
Add the digits in the tens place.
35
23
_____
58
+
There are 58 monkeys at the zoo!
There are 58 monkeys at the zoo. 27 of the monkeys are on the ground. How many monkeys are swinging on vines?
27 + __ = 58
27
Put 27 under the addition sentence.
27 + __ = 58
27
_ _
Put blanks under 27 for the addend we don’t know.
Put 27 under the addition sentence.
27 + __ = 58
27
_ _
58
Put 58 under the addends for the sum.
27
_ _
58
Tens place
Ones place
Are the digits stacked? Make sure the digits in the ones place and tens place line up.
27
_ _
_____
58
+
Put a line under the addends. Put a plus sign on the left of the addends.
27
_ _
_____
58
+
Start with the ones place. What digit is missing? 7 + ___ = 8?
27
_ 1
_____
58
+
7 + 1 = 8.
27
_ 1
_____
58
+
Look at the tens place. What digit is missing? 2 + ___ = 5?
27
31
_____
58
+
2 + 3 = 5.
27
31
_____
58
+
There are 31 monkeys swinging on vines!