Multiplication€¦ · 10 Canadian Curriculum MathSmart (Grade 4) ISBN: 978-1-927042-13-7...
Transcript of Multiplication€¦ · 10 Canadian Curriculum MathSmart (Grade 4) ISBN: 978-1-927042-13-7...
1. Numbers to 10 000 ..................................................................................... 2
2. Addition and Subtraction ......................................................................... 6
3. Multiplication .............................................................................................10
4. Division ........................................................................................................14
5. Time ............................................................................................................18
6. Perimeter and Area ..................................................................................20
7. 2–D Shapes ................................................................................................24
8. 3–D Figures .................................................................................................28
Midway Test ...............................................................................................32
9. Fractions .....................................................................................................38
10. Decimals.....................................................................................................42
11. Addition and Subtraction with Decimals ...............................................46
12. Money ........................................................................................................50
13. Capacity, Volume, and Mass ..................................................................52
14. Patterning ..................................................................................................56
15. Transformation and Coordinates ............................................................60
16. Graphs and Probability ............................................................................62
Final Test .....................................................................................................66
Answers ......................................................................................................73
ISBN: 978-1-927042-13-7
10 ISBN: 978-1-927042-13-7Canadian Curriculum MathSmart (Grade 4)
Multiplication
When you multiply a number by 10, 100, or 1000, just add the same number of z e ro ( e s ) t o t h e number to get the answer.
Multiplication – a short way to find a sum when the addends are the same
Product – the answer you get after multiplying
multiplicand multiplier
Number of stars: 3 x 4 = 12 product
Do the multiplication mentally.
A 5 x 10 = B 10 x 9 =
C 10 x 8 = D 1 x 100 =
E 7 x 100 = F 100 x 2 =
G 3 x 1000 = H 4 x 1000 =
Find the products.
I 4 x 200 = 4 x x 100
= x 100
=
J 2 x 30 = 2 x x 10
= x 10
=
K 5 x 400 = L 7 x 300 =
M 2000 x 9 = N 40 x 6 =
O 3000 x 4 = P 8 x 90 =
Q 500 x 9 = R 6000 x 3 =
Think: 800 = 8 x 100
800 x 4 = 8 x 100 x 4 = 8 x 4 x 100 = 32 x 100 = 3200A quick way to find the answer!
3
11ISBN: 978-1-927042-13-7 Canadian Curriculum MathSmart (Grade 4)
2-digit number x 1-digit numberMultiply the ones. Multiply the tens.
6 x 3 = 18 (Carry 1 ten to the tens column.)
2 x 3 = 6; 6 + 1 = 7
1
2 6x 3 8
1
2 6x 3 7 8
Find the answers.
S T U
V W X
1 3x 2
2 4x 4
1 8x 3
9 8x 6
7 9x 1
3 2x 5
Y 6 x 21 = Z 73 x 4 =
a 5 x 49 = b 26 x 8 =
c 83 x 2 = d 37 x 7 =
e a. 5 helmets cost $ .
b. 8 helmets cost $ .
f a. 15 pairs of knee pads cost $ .
b. 34 pairs of knee pads cost $ .
S o m e t i m e s y o u need to carry more than 1 ten to the tens column.e.g.
Though the order of mul t ip l icat ion h a s changed, the product is the same.e.g. 2 x 14 = 14 x 2
3 6x 7 2 5 2
4 4 tens
12 Canadian Curriculum MathSmart (Grade 4) ISBN: 978-1-927042-13-7
3 Read what Uncle Jeffrey says. Then help him write the numbers.
How many cookies are there in 4 boxes?
g Multiply the ones. Multiply the tens. Multiply the hundreds.
Carry 1 ten to the tens column.
There are cookies in 4 boxes.
1 1
1 3 4 x 4 6
1
1 3 4 x 4 3 6
1
1 3 4 x 4
Find the products.
h i j 2 1 3 x 3
3 7 5 x 4
5 1 9 x 5
k 183 x 6 = l 274 x 9 =
m 408 x 8 = n 812 x 7 =
1st Multiply the ones.2nd Multiply the tens.3rd M u l t i p l y t h e
hundreds.
3-digit 1-digitnumber number
x
Look at the boxes of cereal. Then complete the tables.
o
p
No. of Boxes 3 7 8 9
Total weight (g)
No. of Boxes 2 5 6
Total weight (g)
C a r r y 1 hundred to the hundreds column.
13ISBN: 978-1-927042-13-7 Canadian Curriculum MathSmart (Grade 4)
3q Uncle Philip can make 18 pizzas in an hour. How
many pizzas can he make in 9 hours?
He can make pizzas.
r If 325 pizzas are sold every day, how many pizzas will be sold in a week?
pizzas will be sold.
s If Mrs. Venn buys 15 medium-sized pizzas and 8 large-sized pizzas, how much does she need to pay?
She needs to pay $ .
Answer the questions.
Q u e s t i o n s is a two-step problem. Use multiplication f i r s t ; then use addi t ion to f ind the total.
x
x
x
x
Answer the question.
How many slices of pizza weigh about 800 g?
136 g slices of pizza