Solve Decimal Addition: 0.7 + 0.8 Using Base-10 Blocks

0.7+0.8= 0.7+0.8=

+=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 We'll use long addition for calculation
00:06 Place the decimal point in the appropriate position
00:09 Start by adding the smallest appropriate digits
00:18 Place the units and remember to carry the 1
00:25 Add 1 to this calculation, and place it
00:34 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

0.7+0.8= 0.7+0.8=

+=

2

Step-by-step solution

To solve the problem, let's add the decimals 0.7 and 0.8:

  • Step 1: Align the numbers by their decimal points:
    • 0.70.7
    • +0.8+0.8
  • Step 2: Add the digits from right to left:
    • Tenths place: 7+8=157 + 8 = 15

The result of 7+87 + 8 gives 1515. Since we are in the tenths column, the value is 1.5 (carrying the 1 over to the units place). Thus, the sum is 1.51.5.

Therefore, the solution to the problem is 1.5 \boxed{1.5} .

3

Final Answer

1.5

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