Question

Find:

(i) $1.3\times 10$ (ii) $36.8\times 10$ (iii) $153.7\times 10$

(iv) $168.07\times 10$ (v) $31.1\times 100$ (vi) $156.1\times 100$

(vii) $3.62\times 100$ (viii) $43.07\times 100$ (ix) $0.5\times 10$

(x) $0.08\times 10$ (xi) $0.9\times 100$ (xii) $0.03\times 1000$

Answer 1

We know that when a decimal number is multiplied by $10,100,1000$, the decimal point in the product is shifted to the right by as many places as there are zeroes. Therefore, these products can be calculated as

(i) $1.3\times 10=13$ [shifted decimal towards right for one place]

(ii) $36.8\times 10=368$ [shifted decimal towards right for one place]

(iii) $153.7\times 10=1537$ [shifted decimal towards right for one place]

(vi) $168.07\times 10=1680.7$ [shifted decimal towards right for one place]

(v) $31.1\times 100=3110$ [shifted decimal towards right for two place]

(vi) $156.1\times 100=15610$ [shifted decimal towards right for two place]

(vii) $3.62\times 100=362$ [shifted decimal towards right for two place]

(viii) $43.07\times 100=4307$ [shifted decimal towards right for two place]

(ix) $0.5\times 10=5$ [shifted decimal towards right for one place]

(x) $0.08\times 10=0.8$ [shifted decimal towards right for one place]

(xi) $0.9\times 100=90$ [shifted decimal towards right for two place]

(xiii) $0.03\times 1000=30$ [shifted decimal towards right for three place]