+MATHS (STANDARD FORM & SIGNIFICANT FIGURE)

Find the value of (7 + 1.65) 0.16 and round off the answer correct to three significant figures.

• 1.38

• 7.23

• 1.384

• 7.264

 $7.489\times10^{-6}=$  

• 0.000007489

• 0.00007489

• 7 489 000

• 7 489 000 000

 $2.3\times10^6+95000=$   

•  $1.18\times10^6$  
  

•  $1.18\times10^7$  
  

•  $2.395\times10^6$  
  

•   $2.395\times10^7$  

Express 5630000 in standard form.

• $5.63\times10^{-6}$

• $5.63\times10^{-4}$
  

• $5.63\times10^4$
  

• $5.63\times10^6$
  

Which of the following if round off to three significant figures is not 2.02?

• 2.024

• 2.018

• 2.025

• 2.017

Round off 871 053 correct to four significant figures.

• 870

• 871

• 870 000

• 871 000

Round off 0.05893 correct to two significant figures.

• 0.05

• 0.06

• 0.058

• 0.059

A number 0.00001001 is written on a card. Express the number in standard form.

• $1.001\times10^{-6\ }$

• $1.001\times10^{-5\ }$

• $1.001\times10^5$

• $1.001\times10^6$

Calculate the product of 603.39 and 400.

Round off the answer correct to 3 significant figures.

• 240 000

• 241 000

• 241 300

• 241 400

 $3860000\ is\ written\ as\ 3.86\times10^m\ in\ s\tan dard\ form.\$  Find the value of m.

• 3

• 5

• 6

• 7