Adding and Subtracting Decimals

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Objective

I can add and subtract decimals accurately.

Part 1 of 4

Warm-up video

Miacademy & MiaPrep Learning Channel · 11:30Vetted channel

We don't generate video — this one is by Miacademy & MiaPrep Learning Channel on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.

Part 2 of 4

Key concepts

3 concepts

  1. 1

    When adding or subtracting numbers with decimals, it is important to arrange the numbers vertically and align them by their decimal points.

  2. 2

    Placeholder zeros can be added to the end of a decimal number without changing its value to help keep digits organized by place value.

  3. 3

    We use the same addition and subtraction algorithms for decimals as we do for whole numbers, and it's helpful to bring down the decimal point first.

Part 3 of 4

Practice

3 questions

1

A chef is preparing a recipe that calls for 0.75 liters of milk and 1.2 liters of water. How much liquid is needed in total?

2

A plant grew to a height of 15.3 centimeters. Last week, it was 12.85 centimeters tall. How much did the plant grow this week?

Part 4 of 4

Exit ticket

Quick comprehension check

Mia bought a new baseball bat for $35.99 and a baseball glove for $28.50. She paid with a $70 bill. How much change did Mia receive? Show all your work.

Sample answer included in the free materials

Get the materials

Teacher guide, student handout, and slides — free, in Google Docs format

  • Teacher Guide

    Complete lesson plan with answer keys and alternate activities

  • Student Handout

    Printable worksheet

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