5.1B Use of Brackets & Order of Operations

5.1B Use of Brackets & Order of Operations

1G1 Textbook 1A Page 166 - 173

Multiple Choice

Try It 7 ! page 166
Melvin had $b in his bag and $w in his wallet.

He spent ⅓ of the total amount of money.
(a) The amount of money that he spent, in its simplest form is

• $$\frac{1}{3}\times\left(b+w\right)$$

• $$\frac{1}{3}\times b\times w$$

• $$\frac{1}{3}\left(b+w\right)$$

• $$\frac{1}{3}bw$$

Multiple Choice

Try It 7 ! page 166
Melvin had $b in his bag and $w in his wallet.

He deposited 25% of the total amount in the bank.
The amount of money that he deposited in the bank, in its simplest form, is

• 25 × (b+w)

• $$\frac{1}{4}\times\left(b+w\right)$$

• $$\frac{25}{100}\times\left(b+w\right)$$

• $$\frac{1}{4}\left(b+w\right)$$

Draw

Ex 5B, TB page 172, Q2
Suguna had $s. She earns $e.

She donates 10% of the total amount to charity. Write an algebraic expression for
(b) the amount of money that she donates.

Draw

Ex 5B, TB page 172, Q2
Suguna had $s. She earns $e.

She then spends $$\frac{1}{6}$$ of the total amount of money.

Write an algebraic expression for
(a) the amount of money that she spends.

Multiple Choice

Ex 5B, TB page 173, Q3
(a) In a box, there are r red pens, b blue pens and g green pens.
How many pens are there in 10 such boxes?

• 10rbg

• 10(r+b+gc+e)

• $$\frac{r+b+g}{10}$$

• 10-r-b-g

Multiple Choice

Ex 5B, TB page 173, Q3
(c) Kah Sheng had $k.

He spends $s.
He then distributes the remaining amount of money equally among 5 charities.

How much money does each charity receive?

• k - s - 5

• $$\frac{k-s}{5}$$

• k - s ÷ 4

• $$k-\frac{s}{5}$$

Draw

Ex 5B, TB page 173, Q3

(d) Johari had p boxes of marbles.

Each box contains 20 marbles.

He repacks the marbles into packets of 3 marbles each.

How many packets of marbles will there be?

Multiple Select

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