Question

Find the cube of 32 by the shortcut method

Answer 1

Answer:

Plz say thanks to my answer

Step-by-step explanation:

METHOD: For finding the cube of a two-digit number with the tens digit = a and the units digit = b, we make four columns, headed by a³, (3a² × b), (3a × b²) and b³ The rest of the procedure is the same as followed in squaring a number by the column method.

Answer 2

Answer:

answer is 27000

step

My take:

［EDITED ］3³=27

(3.2³)

=3.2²×3.2

=10.24×3.2

≡10.24×3+10.24×0.2

=30.720+2.048

=32.768>32

let 32= (3.2—x)³

32≈3.2³—3*3.2²*x

32≈32.768–3×10.24*x

32≈32.768—30.72x

30.72x≈32.768–32.0

30.72x≈0.768

x≈0.768/30.72

=76.8/3072

〖7680—6144=1536〗

〖15360=5*7680〗

≈0.025

∴³√32≈3.200–0.025≈3.175