Numbers to 120
Unit 1 Counting, Reading and Writing Numbers
Exercise 1.1 Counting, reading and writing numbers in tens
Coursebook Recap
1. Count in tens. Then, write the missing numbers.
2. Match.
3. Write the numbers in English words.
Coursebook Recap
1. Count and write the missing numbers.
There are cans. There are sticks.
2. Write the missing numerals or number words in English. 3. Match.
Exercise 1.3 Numbers in hundreds, tens and ones
Coursebook Recap
100, 10 and 5 make 115.
115 = 1 hundred 1 ten 5 ones
115 = 100 + 10 + 5
1. Count and write the missing numbers.
106 = +
2. Write the missing numbers.
a) 5 tens 5 ones = b) 1 hundred 1 ten 0 ones = c) is 90 and 4. d) is 100 and 7.
3. Add.
a)
Exercise 1.4 Counting by grouping
Coursebook Recap
Count forwards in 2s.
2, 4, 6, 8, 10, 12, 14
There are 14 cans.
14 cans can be put into groups of 2. 14 is an even number.
An even number of objects can be put into groups of 2. An odd number of objects cannot be put into groups of 2. There will be 1 object left over.
An even number has the digit 0, 2, 4, 6 or 8 in the ones place. An odd number has the digit 1, 3, 5, 7 or 9 in the ones place.
1. Count and write the number of objects. Circle groups of 2, 5 or 10 objects to help you count.
a)
b)
2. Cross out the group that shows an even number.
3. Circle the group that shows an odd number.
4. Circle the odd numbers. 29 36 50 63 101 115
5. Is 110 an even or an odd number? Why?
Even number The digit in the ones place is 0.
Unit 2 Order of Numbers
Exercise 2.1 Finding more than and less than
Coursebook Recap
57 58 59 60 61 62 count forwards count backwards
1. Write the missing numbers.
Count forwards 5 ones from 57. 5 more than 57 is 62.
Count backwards 2 ones from 62. 2 less than 62 is 60.
a) is 1 more than 47. is 5 more than 47. is 10 less than 47.
b) is 10 less than 64. is 5 less than 64. is 2 more than 64.
2. Answer the questions.
a) What number is 2 more than 52?
b) What number is 5 less than 45?
c) What number is 1 more than 109?
d) What number is 10 more than 92?
e) What number is 10 less than 39?
f) What number is 1 less than 81?
g) What number is 2 less than 120?
h) What number is 5 more than 106?
Exercise 2.2 Number patterns
Coursebook Recap
pattern: Start at 66. Count forwards in 3s.
The number pattern is 66, 69, 72, 75, 78.
The next two numbers in the pattern are 81 and 84.
1. Complete the number patterns. Then, describe the number patterns.
2. Continue each number pattern. Then, describe the number pattern.
a) 69, 64, 59, , , Count in _.
b) 36, 39, 42, , , Count in .
c) 85, 75, 65, , , Count in .
d) 48, 53, 58, , , Count in .
e) 47, 45, 43, , , Count in .
54 45 backwards forwards backwards forwards backwards
3. Complete the number patterns.
a) 45, 47, 49, , , 55, , , 61
b) , , 70, , 50, , 30, 20, 10
c) , , 87, 90, 93, ,
d) 59, , 69, , , 84, 89
e) , 95, , 85, , , 70
f) , , 31, , 51, , 71,
g) 116, , , 110, , 106, , 102
Exercise 2.3 Reading number lines
Coursebook Recap
1. Complete the number lines. a) b) 2. Look at the number line.
1 more than 73 is 74. represents 74.
1 less than 79 is 78. represents 78.
a) Label the number that is 10 more than 64 with A.
b) Label the number that is 1 less than 69 with B.
c) Label the number that is 5 more than 67 with C.
d) Label the number that is 2 less than 67 with D.
3. Mark 82 with a cross on the number line below.
Exercise 2.4 Rounding numbers to the nearest ten
Coursebook Recap
43 is nearer to 40 than to 50.
So, 43 is 40 when rounded to the nearest ten.
To round a number to the nearest ten, look at the digit in the ones place. If it is 5 or greater, round up. If it is less than 5, round down.
1. Round each number to the nearest ten.
2.
a) Isla collected 17 seashells from the beach.
Round the number of seashells to the nearest ten.
b) Leo has 34 toy soldiers.
Round the number of toy soldiers to the nearest ten.
c) There are 75 storybooks in a class library.
Round the number of storybooks to the nearest ten.
d) 108 children took part in a Tough Kids Challenge.
Round the number of children to the nearest ten.
e) Mrs Smith sold 112 meat pies.
Round the number of meat pies to the nearest ten.
Exercise 2.5 Comparing and ordering numbers
Coursebook Recap
65 is less than 69.
65 < 69
1. Compare the numbers using > or <.
First, compare the tens. They are the same. Then, compare the ones. 5 ones is less than 9 ones.
a) 35 85 b) 38 48 c) 57 64 d) 56 52 e) 116 118 f) 106 112
2. Circle True or False.
a) 71 < 69 True / False
b) 120 > 112 True / False
3. Arrange the numbers in order. Begin with the greatest number.
a) 47, 49, 56
b) 82, 63, 87, 78
c) 115, 109, 119, 105
4. Arrange the numbers in order. Begin with the least number.
a) 76, 72, 71
b) 50, 59, 53, 38
c) 103, 98, 93, 109
6 5 6 9 < > < < < < 71, 72, 76 38, 50, 53, 59 93, 98, 103, 109 119, 115, 109, 105 87, 82, 78, 63 56, 49, 47