Answer:
MgCl₂
Step-by-step explanation:
Multi ting a number is like adding the number that many times.
Repeated addition would be adding 3/4 to itself 4 times:
3/4 + 3/4 + 3/4 + 3/4 = 12/4 = 3
Then multiplication method:
3/4 x 4 = 12/4 = 3
Answer:
1 1/2
Step-by-step explanation:
divide 4 1/2 by 3 and you get 1 1/2 witch is equal to three batches
4 1/2 ÷ 3 = 1 1/2
to check if correct
1 1/2 + 1 1/2 + 1 1/2 = 4 1/2
Answer:
Step-by-step explanation:
Answer:
a)$15.95
b) 8kg
Step-by-step explanation:
a)Approach this question by finding how much does it cost for 1g
So,
$2.1/50=$0.042per gram
then, multiple 380 to get the cost of sweets for 380 g
$0.042/gram*380gram=$15.96(Note: the gram cancel out each other)
Which is $15.95 as the question requested
b)This question stated that 3/4 of the metal has 15 kg
So, in order to find the total mass of metal we invert the 3/4 fraction
e.g 4/3*15=20kg
now we have the total mass we can find the mass for 2/5 of the metal
2/5*20kg=8kg
