Question: CA-60 Chapter 3 . Addition and Subtraction SECTION 3.2 CLASS ACTIVITY 3-E X Mental Math Try to find ways to make the problems that follow

CA-60 Chapter 3 . Addition and Subtraction SECTION 3.2 CLASS ACTIVITY 3-E X Mental Math Try to find ways to make the problems that follow easy to do mentally. In each case, explain your method. 1. 7999 + 857 + 1 2. 367 + 98 + 2 3. 153 + 19 + 7 4. 7.89 + 6.95 + 0.05

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