Lesson 5 Add Within 50

- Let’s add within 50.

Warm-up Number Talk: Two-Digit, One-Digit

Find the value of each sum mentally.

$16 + 3$
$16 + 5$
$26 + 5$
$38 + 6$

Activity 1 Revisit How Close, Add to 100

Digit card. Number 3.

Digit card. Number 8.

Digit card. Number 4.

Digit card. Number 6.

Digit card. Number 6.

Digit card. Number 2.

Digit Card. Number 1.

Activity 2 Add within 50

Find the value of each sum. Show your thinking using drawings, numbers, or words.

$37 + 8$
$24 + 23$
$16 + 30$
$39 + 11$
$27 + 15$

Practice Problem

Problem 1

Find the value of each sum. Show your thinking using drawings, words, or numbers.

$31 + 15$
$17 + 8$
$26 + 17$