Lesson 16 Addition and Subtraction

- Let’s use place value strategies to add and subtract decimals.

Warm-up Number Talk: Subtracting Decimals

Find the value of each expression mentally.

$2.57 - 2.55$
$2.57 - 2.49$
$2.57 - 0.99$
$2.57 - 0.59$

Activity 1 What’s the Difference?

Find the value of each expression. Explain or show your reasoning.

$7.35 - 2.6$
$100.8 - 6.03$
$26.5 - 13.62$
$465 - 463.14$

Activity 2 Sums and Differences

Find the value of each expression. Explain or show your reasoning.

$36.51 - 4.3$
$100 + 31.05$
$100 - 31.05$
$266.43 + 75.9$

Activity 3 Subtraction with Larger Numbers

Find the value of each expression.

$43.14 - 18.6$
$73.3 - 52.99$
$128.44 - 62.57$
$261.25 - 260.7$

Practice Problem

Problem 1

Find the value of each expression.

$37.06 - 22.57$
$555 - 4.44$