MathBrush

Practice

Same pattern as Fractions Branching. New numbers, new story. Try each one on paper, then check the working below — or watch it drawn out, the same way the problem above is.

Question 1

Mr Rahman had some chairs in storage. He moved 2/5 of them to the wedding void deck. He then moved 1/3 of the remainder to the funeral void deck. He had 8 chairs left in storage. How many chairs were in storage at first?

Work it out on paper, then check below. ▶ See the working

Question 2

Mr Rahman had some chairs in storage. He moved 1/6 of them to the wedding void deck. He then moved 2/5 of the remainder to the funeral void deck. He had 18 chairs left in storage. How many chairs were in storage at first?

Work it out on paper, then check below. ▶ See the working

Question 3

Mrs Ong had some tokens for the swimming complex. She gave 2/5 of them to her son. She then gave 2/3 of the remainder to her daughter. She had 45 tokens left. How many tokens did her daughter get?

Work it out on paper, then check below. ▶ See the working

Question 4

Priya had some stickers. She gave 3/8 of them to her sister. She then gave 3/5 of the remainder to her friend. She had 8 stickers left. How many stickers did her friend get?

Work it out on paper, then check below. ▶ See the working

Question 5

The workman had a pile of sand at the playground. He used 3/8 of it for the sandpit. He then used 4/5 of the remainder for the flower bed. He had 50 kilograms of sand left. How many kilograms of sand were in the pile at first?

Work it out on paper, then check below. ▶ See the working

Question 6

Wei Jie topped up his transport card with some money. He used 2/5 of it for the bus ride. He then used 2/3 of the remainder for the train ride. He had $20 left on the card. How much did Wei Jie top up at first?

Work it out on paper, then check below. ▶ See the working

Question 7

Wei Jie topped up his transport card with some money. He used 1/3 of it for the bus ride. He then used 1/2 of the remainder for the train ride. He had $36 left on the card. How much did Wei Jie top up at first?

Work it out on paper, then check below. ▶ See the working

Question 8

Auntie Bee had a basket of prawns at the wet market. She sold 1/9 of it to a regular customer. She then sold 3/4 of the remainder to a new customer. She had 90 grams of prawns left. How many grams of prawns did a new customer buy?

Work it out on paper, then check below. ▶ See the working

Question 9

Farhan had a bag of marbles. He gave 3/5 of them to his cousin. He then gave 1/2 of the remainder to his classmate. He had 4 marbles left. How many marbles did Farhan have at first?

Work it out on paper, then check below. ▶ See the working

Question 10

Mdm Chua had a trolley of books to shelve. She placed 1/6 of them on the Primary 1 shelf. She then placed 4/5 of the remainder on the Primary 2 shelf. She had 16 books left on the trolley. How many books were on the trolley at first?

Work it out on paper, then check below. ▶ See the working

Question 11

Mdm Chua had a trolley of books to shelve. She placed 1/5 of them on the Primary 1 shelf. She then placed 3/4 of the remainder on the Primary 2 shelf. She had 5 books left on the trolley. How many books did she place on the Primary 2 shelf?

Work it out on paper, then check below. ▶ See the working

Question 12

Uncle Kok had a sack of rice at his hawker stall. He used 4/9 of it for the chicken rice stall. He then used 1/5 of the remainder for the economy rice stall. He had 160 grams of rice left. How many grams of rice were in the sack at first?

Work it out on paper, then check below. ▶ See the working

Question 13

Miss Nur had a box of pencils for the class. She gave 3/8 of them to Group A. She then gave 4/5 of the remainder to Group B. She had 9 pencils left in the box. How many pencils were in the box at first?

Work it out on paper, then check below. ▶ See the working

Question 14

Hui Min had some beads for her CCA craft project. She used 4/9 of them for a bracelet. She then used 3/5 of the remainder for a keychain. She had 20 beads left. How many beads did Hui Min have at first?

Work it out on paper, then check below. ▶ See the working

Question 15

Mr Goh had a book of parking coupons. He used 1/9 of them for the morning trip. He then used 1/4 of the remainder for the evening trip. He had 240 coupons left. How many coupons did he use for the evening trip?

Work it out on paper, then check below. ▶ See the working

Question 16

Mr Goh had a book of parking coupons. He used 1/6 of them for the morning trip. He then used 3/5 of the remainder for the evening trip. He had 72 coupons left. How many coupons did he use for the evening trip?

Work it out on paper, then check below. ▶ See the working

The working