How many whole numbers are there between 860 and 900
Answers
Answer:
In this chapter you will learn more about whole numbers. You will learn about different ways to express whole numbers as sums and products. You will learn about different ways of doing calculations, and different ways of recording your work when doing calculations. You will strengthen your skills to do calculations and to solve problems.
Revision
Do not use a calculator at all in section 1.1.
Build numbers up and break numbers down
Write each of the following sums as a single number:
The word sum is used to indicate two or more numbers that have to be added.
4000+800+60+5
4
000
+
800
+
60
+
5
8000+300+7
8
000
+
300
+
7
40000+9000+200+3
40
000
+
9
000
+
200
+
3
800000+70000+3000+900+2
800
000
+
70
000
+
3
000
+
900
+
2
The answer obtained when the numbers are added, is also called the sum. We say: 20 is the sum of 15 and 5.
8 thousands+7 hundreds+8 units
8
thousands
+
7
hundreds
+
8
units
4 hundred thousands+8 ten thousands+4 hundreds+9 tens
4
hundred thousands
+
8
ten thousands
+
4
hundreds
+
9
tens
What is the sum of 8000
8
000
and 24
24
?
Write each of the numbers below as a sum of units, tens, hundreds, thousands, ten thousands and hundred thousands, like the numbers were given in question 1(e) and (f).
When a number is written as a sum of units, tens, hundreds, thousands etc., it is called the expanded notation.
8706=
8
706
=
449203=
449
203
=
83490=
83
490
=
873092=
873
092
=
Arrange the numbers in question 3 from smallest to biggest.
Write the numbers in expanded notation (for example, 791=700+90+1
791
=
700
+
90
+
1
).
493020
493
020
409302
409
302
490032
490
032
400932
400
932
Arrange the numbers in question 5 from biggest to smallest.
Write each sum as a single number.
600000+40000+27000+100+20+34
600
000
+
40
000
+
27
000
+
100
+
20
+
34
320000+40000+8000+670+10+5
320
000
+
40
000
+
8
000
+
670
+
10
+
5
500000+280000+7000+300+170+38
500
000
+
280
000
+
7
000
+
300
+
170
+
38
4 hundred thousands+18 ten thousands+4 hundreds+29 tens+5 units
4
hundred thousands
+
18
ten thousands
+
4
hundreds
+
29
tens
+
5
units
Write each sum as a single number.
300000+70000+6000+400+80+6
300
000
+
70
000
+
6
000
+
400
+
80
+
6
400000+20000+2000+500+10+3
400
000
+
20
000
+
2
000
+
500
+
10
+
3
500000+40000+7000+300+60+6
500
000
+
40
000
+
7
000
+
300
+
60
+
6
800000+90000+7000+800+90+8
800
000
+
90
000
+
7
000
+
800
+
90
+
8
300000+110000+12000+400+110+3
300
000
+
110
000
+
12
000
+
400
+
110
+
3
In each case, add the two numbers. Write the answer in expanded form and also as a single number.
(a) The number in 8(a) and the number in 8(b)
The number in 8(c) and the number in 8(b)
The number in 8(c) and the number in 8(a)
The number in 8(d) and the number in 8(a)
Subtract the number in 8(b) from the number in 8(d).
Are the numbers in 8(b) and 8(e) the same?
Subtract the number in 8(a) from the number in 8(b).
Write each of the following products as a single number:
The word product is used to indicate two or more numbers that have to be multiplied.
2×3
2
×
3
2×3×5
2
×
3
×
5
2×3×5×7
2
×
3
×
5
×
7
2×3×5×7×2
2
×
3
×
5
×
7
×
2
The answer obtained when numbers are multiplied, is also called the product. We say: 20 is the product of 2 and 10.
2×3×5×7×2×2
2
×
3
×
5
×
7
×
2
×
2
What is the product of 20 and 500?
Write 1 000 as a product of 5 and another number.
Write 1 000 as a product of 50 and another number.
Write 1 000 as a product of 25 and another number.
What is the product of 2 500 and 4?
What is the product of 250 and 40?
In the table on the right, the number in each yellow cell is formed by adding the number in the red row above it to the number in the blue column to its left. Write the correct numbers in all the empty yellow cells.
+
+
2
3
4
5
10
20
30
34
8
Step-by-step explanation:
Answer:
39 is the answer please leave a comment and follow me