Singapore Math Level 3A & 3B – Unit 8: Problem Solving- Multiplying And Dividing - 20 Questions
Unit 8: PROBLEM SOLVING - MULTIPLYING AND DIVIDING
Here, we will provide solutions to some questions based on the topic of Multiplying and Dividing, which is Unit 8 of Singapore Math Level 3A. The questions here are presented slightly differently from the main textbook, but the rules of Multiplying and Dividing remain the same, and the solution results have also been kept identical. So, let's solve the equivalent questions.
Q(1-20): Solve the following word problems. Show your work in the space below.
1. Emelda saved $135 in December. She saved twice as much in January. How much did Emelda save in January?
Solution(1):
$135×2=$270
× 2
----------
270
Emelda saved $270 in January.
2. Kyra bakes 484 cat biscuits. Charley bakes 4 times as many cat biscuits as Kyra. How many cat biscuits does Charley bake?
Solution(2):
484×4=1936
× 4
-------------
1936
Kyra bakes 1936 cat biscuits.
3. 187 students watched a cinema on Wednesday. 3 times as many students watched the same cinmea over the weekend. How many students watched the cinema that weekend?
Solution(3):
187×3=561
×3
----------
561
561 students watched the cinema that weekend.
4. Bakery X sold 565 pastries. Bakery Y sold twice as many pastries as Bakery X. How many pastries did Bakery Y sell?
Solution(4):
565×2=1130
×2
-------------
1130
Bakery Y sold 1130 pastries.
5. Kelly bought 8 packets of chocolates. There were 25 chocolates in each packet. How many chocolates did she buy altogether?
Solution(5):
25×8=200
×8
--------------
200
Kelly bought 200 chocolates altogether.
6. Audrey owns a fish farm. She bought 1506 fish to be divided equally among her 3 ponds. How many fish could she put into each pond?
Solution(6):
1506÷3=502
3)1506
15
-----------
0
0
------------
6
6
--------------
0
She could put 502 fish into each pond.
7. Emelda spent $516 on food over 6 months. She spent an equal amount of money on food every month. How much did Emelda spend on food each month?
Solution(7):
$516÷6=$86
6)516
48
---------
36
36
---------
0
Emelda spent $86 on food each month.
8. McKay has 679 beads. She uses 8 beads to make a bracelet.
(a) How many bracelets can McKay make?
(b) How many beads are left?
Solution(8a&b):
679 ÷ 8 = 84 R 7
8)679
64
------------
39
32
------------
7
(a) McKay can make 84 bracelets.
(b) 7 beads are left.
9. Lauren earns $1,375 a month. Sean earns $70 less than Lauren. Jade earns twice as much as Sean.
(a) How much does Sean earn?
(b) How much does Jade earn?
Solution(9a&b):
(a)
$1375–$70=$1305
-70
--------------
1305
Sean earns $1305.
(b)
$1305×2=$2610
×2
--------------------
2610
Jade earns $2610.
10. There are 425 females in a football tournament gallery. There are twice as many males as females in the gallery.
(a) How many males are there?
(b) How many people are there altogether?
Solution(10a&b):
(a)
425×2=850
×2
----------------
850
There are 850 males.
(b)
850+425=1275
+425
-------------
1275
There are 1275 people altogether.
11. John collected 312 stickers in January. He collected 68 more stickers in February.
(a) How many stickers did John collect in February?
(b) How many stickers would each friend get if John’s collection for february was shared equally between his 2 friends?
Solution(11a&b):
(a)
312+68=380
+68
-------------
380
John collected 380 stickers in February.
(b)
380÷2=190
2)380
2
-------------
18
18
-------------
0
0
------------
0
Each friend would get 190 stickers.
12. Keiko spends $175 on food and clothing every month. Hasaan spends $159 on food and clothing every month.
(a) How much more money does Keiko spend on food and clothing than Hasaan?
(b) How much more money does Keiko spend on food and clothing than Hasaan in 6 months?
Solution(12a&b):
(a)
$175–$159=$16
----------
1 6
Keiko spends $16 more than Hasaan on food and clothing.
(b)
$16×6=$96
×6
---------
96
Keiko spends $96 more on food and clothing than Hasaan in 6 months.
13. Alex travels 98 km from his home to office. He travels the same distance back home.
(a) How far does Alex travel to and from the office?
(b) Alex has to travel to and from the office every day in a week. How far will he travel in all?
Solution(13a&b):
(a)
98×2=196
× 2
----------
196
Alex travels 196 km to and from the office.
(b)
196×7=1372
×7
-------------
1372
He will travel 1372 km in all.
14. Larry saved $160 every month. He then bought 8 Christmas presents with the money he saved.
(a) How much did Larry save in half a year?
(b) What was the cost of each Christmas present if Larry paid the same amount of money for all the Christmas presents?
Solution(14a&b):
(a)
$160×6=$960
×6
---------
960
Larry saved $960 in half a year.
(b)
$960÷8=$120
8)960
8
-------------
16
16
--------------
0
0
--------------
0
The cost of each Christmas present was $120.
15. Maria sews 8 Kebayas in a week. Each Kebaya uses 6 yd. of sheer fabric.
(a) How much sheer fabric does she use in a week?
(b) If she buys 100 yd. of sheer fabric, how much sheer fabric does she have left?
Solution(15a&b):
(a)
6×8=48
She uses 48 yd. of sheer fabric in a week.
(b)
100–48=52
She has 52 yd. of sheer fabric left.
16. Cooper bought 9 packages of color pencils. There were 25 color pencils in each package. If Kelly were to give 5 color pencils to each student, how many students did he have?
Solution(16):
25×9=225
× 9
--------
225
There were 225 color pencils altogether.
225÷5=45
5)225
20
--------
25
25
-------
0
He had 45 students.
17. Annie bought 3 crates of oranges. There were 24 oranges in each crate. She then bought 245 apples. How many pieces of fruit did Annie buy altogether?
Solution(17):
24×3=72
×3
--------
72
There were 72 oranges altogether.
72+245=317
+72
-----------
317
Annie bought 317 pieces of fruit altogether.
18. A chair costs $95. A table costs $190. If Kelly buys 2 chairs and a table, how much money does she need?
Solution(18):
$95×2=$190
×2
-------
190
$190×2=$380
×2
------
380
She needs $380.
19. Brooke bought a study chair for $75. He then bought a study desk that cost 3 times as much as the study chair. How much did Brooke pay for the furniture?
Solution(19):
$75×4=$300
× 4
---------
300
Brooke paid $300 for the furniture.
20. Linh scored a total of 171 points in Science and Social Studies. She scored twice as many points in Science as she did in Social Studies. How many points did she score in Science?
Solution(20):
171÷3=57
3)171
15
---------
21
21
--------
0
57×2=114
× 2
---------
114
She scored 114 points in Science.
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