Write 437 950 using expanded notation using powers of ten.
4×10(5)+3×10(4)+7×10(3)+9×10(2)+5×10
400
A submarine was cruising 100 metres below sea level. It descends 128metres and then ascends 145 metres. What is its final depth?
-100-128+145=-83m 83metres below sea level
400
3/5-6/4=?
-9/10
400
1&5/8÷39=?
1/24
400
Put the following in order from smallest to largest by converting the fractions to percentages first.
15%, 1/4, 85/100, 3/4%
3/4%, 15%, 1/4, 85/100
400
7% of 20=?
1.4
500
22+ -98- -6=?
-70
500
1/2+1/3-1/4=?
7/12
500
Stacy is doing some baking. Her recipe calls for 1/4 cup of sugar. If she has a 2-kg bag of sugar, and if 1 cup of sugar weighs 200g, how many batches of the recipe can she make?
40 batches
Working out:
2kg=2000g
1/4 × 200=50g
2000÷50=40 batches
500
sixty students in Year 8 have seen all of the Harry Potter films. If there are 150 students in Year 8, what percentage of them have seen all of the Harry Potter films?
60/150=0.4=40%
500
Jordan had a mass of 100kg. After one month of not eating McDonald's, he lost 4kg. What percentage of his mass did Jordan lose?