Question

use the model to find 97 × 21. first, find the area of each rectangle. then, find the total area. 97 × 21 =

Explanation:

Step1: Calculate area of yellow - rectangle

$90\times20 = 1800$

Step2: Calculate area of cyan - rectangle

$90\times1=90$

Step3: Calculate area of orange - rectangle

$7\times20 = 140$

Step4: Calculate area of pink - rectangle

$7\times1=7$

Step5: Calculate total area

$1800 + 90+140 + 7=2037$

Answer:

$2037$