Question

part a
which basic multiplication fact can you use to find the product of 40 and 30?
4 × 3 = 12
6 × 4 = 24
8 × 3 = 24
8 × 6 = 48
part b
use mental math to find the product of 40 and 30.
enter your answer in the box.
80

Explanation:

Part A

Step1: Analyze 40 and 30

40 is 4×10, 30 is 3×10.

Step2: Identify basic fact

The basic multiplication fact for 40×30 is related to 4×3. So 4×3 = 12 is the relevant fact.

Step1: Break down numbers

40 = 4×10, 30 = 3×10.

Step2: Multiply basic fact and tens

First, \( 4 \times 3 = 12 \). Then, multiply by 10×10 = 100. So \( 12 \times 100 = 1200 \).

Answer:

A. \( 4 \times 3 = 12 \)

Part B