Question

Calculate the product of $155\times 7$ using the area model.

• A. 1,050
• B. 385
• C. 1,850
• D. 1,085

Answer 1

The correct option is D 1,085

$155=100+50+5$
$\left(H\right)\left(T\right)\left(O\right)155\times 7=(100+50+5)\times 7$

+
Hence, $155\times 7=(100+50+5)\times 7=700+350+35=1,085.$