- p. 9Multiplication Galaxy: Tens. Count the tens, then write each product.
The standard
Use place value reasoning and properties of operations to multiply one-digit whole numbers by multiples of 10, in the range 10-90.
Element 3.PAR.3.5 of Georgia's K-12 Mathematics Standards (2021, effective SY2023-24), in the Patterning & Algebraic Reasoning strand. It sits under standard 3.PAR.3: Use part-whole strategies to solve real-life, mathematical problems involving multiplication and division with whole numbers within 100.
What students practice
One page in Space Math Adventure counts tens to multiply one-digit numbers by 20 through 90, reading 4 × 30 as 12 tens. There are 16 products on the page, with an answer key in the same layout.
Where to find it
Think: 4 × 30 is 4 × 3 tens = 12 tens, which is 120.