20+20+20+7=

Here is a clear, step-by-step solution in simple English, suitable for a 2nd-grade level.

Problem: 20 + 20 + 20 + 7 = ?

Answer: 67

Steps:

• Step 1: Add the first two numbers: 20 + 20 = 40.
• Step 2: Add the next 20: 40 + 20 = 60.
• Step 3: Add 7: 60 + 7 = 67.

Why this works (quick ideas):

• Three 20s make 60 (because 20 + 20 + 20 = 60).
• Then add 7 to get 67.

Place-value way (for understanding):

• 20 has tens = 2 and ones = 0.
• Tens: 2 + 2 + 2 = 6 tens = 60.
• Ones: 0 + 0 + 0 + 7 = 7.
• Total: 60 + 7 = 67.

Word form:

• “Twenty plus twenty plus twenty plus seven equals sixty-seven.”