## Add With Mental Math

### Add with Mental Math: Learn

How to mentally add two two-digit numbers:

Example: Add 84 and 35

• First add the two ones' place digits (4 + 5 = 9)
• Next add the two tens' place digits (8 + 3 = 11)
• The sum of the ones' place digits is less than ten so the answer is 119

Example: Add 94 and 67

• First add the two ones' place digits (4 + 7 = 11)
• Next add the two tens' place digits (9 + 6 = 15)
• The sum of the ones' place digits is a two-digit number so...
• decrease the ones' place sum by 10 (11 - 10 = 1)
• increase the tens' place sum by 1 (15 + 1 = 16)
• Combine the tens' and ones' place sums to give the answer of 161

### Add with Mental Math: Practice

#### What is the Sum of the two Numbers?

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