Lesson: Adding Tens to Two-Digit Numbers Mathematics • 1st Grade

In this lesson, we will learn how to add a multiple of ten to a two-digit number and model this with place value equipment.

Lesson Plan

Students will be able to

model adding multiples of ten to a two-digit number by drawing pictures to represent amounts,
add multiples of ten to a two-digit number using place value blocks,
add multiples of ten to a two-digit number by drawing lines and dots to represent tens and ones,
add multiples of ten to a two-digit number, recording the calculation in a place value chart.

Q1:

Isabella is making a road with red blocks and blue blocks. She needs 52 blocks altogether.

Which group of red and blue blocks will make 52?

Q2:

23 children from Class A joined 30 children from Class F. How many children were there altogether?

Q3:

What is the missing number in ?