Math Test: Decimals

Group M3!

Please note that the test on decimals will be held this Thursday. Details are as follow:-

Date: 2nd Aug (Thu)

Time: 12.30pm to 1.30pm

Topic: Chapter 9 (Decimals)

Main pointers:

• When multiplying by 10, 100 or 1000, shift the decimal point to the RIGHT by 1, 2 or 3 places respectively - Answer should be a bigger number.


• When dividing by 10, 100 or 1000, shift the decimal point to the LEFT by 1, 2 or 3 places respectively - Answer should be a smaller number.


• In your workings when multiplying a decimal number with another whole number, count the number of decimal places and put the decimal point at your final answer.


• For the following conversion of units, multiply by 100 (m -> cm)


• For the following conversion of units, multiply by 1000 (km -> m, kg -> g, l -> ml)


• For the following conversion of units, divide by 100 (cm -> m)

• For the following conversion of units, divide by 1000 (m -> km, g -> kg, ml -> l)



• If there is no other numbers/digits in front of a decimal point, put ONE zero. (e.g. 0.32 and not 00.32)


• If there is no other numbers/digits behind a decimal number point, leave out the extra zeroes. (e.g. 0.8 and not 0.800)


• However, for money values involving cents, always write it in 2 decimal places. (e.g. $5.90 and not $5.9)


• Write your units for all answers involving measurements (cm, m, km, ml, l, g, kg, min, h)