Addition and Subtraction within 10
1 xample 1
Cami made 3 paper planes. Minnie made 2 more paper planes than Cami. (a) How many paper planes did Minnie make? (b) How many paper planes did they make altogether? olution (a) Cami
Minnie
(b)
3+2=5 5
Minnie made
2 more
paper planes.
Cami and Minnie
?
3+5=8
They made
8
paper planes altogether. 1
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Mathematics Primary 1 Unit 1 Addition and Subtraction within 10
xample 2 Eddy has 7 paper rockets. Bala has 4 fewer paper rockets than Eddy. How many paper rockets do they have altogether? olution Eddy
Bala
4 fewer 7–4=3
Bala has
3
paper rockets.
Eddy and Bala
?
7 + 3 = 10 They have 10 paper rockets altogether.
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Mathematics Primary 1 Unit 1 Addition and Subtraction within 10
ractice 1. Jun has a coin in his pocket. His father gives him 5 more coins. He puts them in his pocket. How many coins are there in his pocket?
2. Fancy has 10 buttons. She drops 3 buttons. How many buttons does she have left?
3
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Mathematics Primary 1 Unit 1 Addition and Subtraction within 10
3. 6 hamsters are playing with 4 squirrels. How many animals are playing altogether?
4. Alisha made 5 cakes. How many more cakes must she make to have 8 cakes altogether?
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Mathematics Primary 1 Unit 1 Addition and Subtraction within 10
5. In a Mathematics quiz, Ann scores 3 marks. Peter scores 4 more marks than Ann. Vincent scores 2 more marks than Peter. How many marks does Vincent score?
6. Steven had 9 balls. He gave some away to Tom and had 2 balls left. How many balls did he give to Tom?
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Mathematics Primary 1 Unit 1 Addition and Subtraction within 10
7. Shelly was carrying 4 books. On her way to class, Gwen gave her 4 more books. How many books did Shelly have altogether?
8. Devo has 8 muffins. 2 of them are on the plate and the rest are in a box. How many muffins are there in the box?
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Mathematics Primary 1 Unit 1 Addition and Subtraction within 10
9. Jimmy had 8 candies. He ate 2 candies. Then he gave Joe 1 candy. How many candies did Jimmy have left?
10. There are 10 children on the bus. 2 boys and 6 girls get off from the bus. How many children are there on the bus now?
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Mathematics Primary 1 Unit 1 Addition and Subtraction within 10
11. There were 6 tigers in a cage. 3 tigers were sent for a performance. How many tigers were left in the cage?
12. There are some red and yellow paper clips in a container. There are 2 more yellow paper clips than red paper clips. If there are 3 red paper clips, how many paper clips are there in the container in total?
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Mathematics Primary 1 Unit 1 Addition and Subtraction within 10
13. There are 4 girls and 5 boys at the playground. 6 children are wearing caps. How many children are not wearing caps?
14. Chloe borrowed some storybooks from the library. She returned 2 storybooks to the library and had 5 storybooks left. How many storybooks did she borrow from the library altogether?
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2
Shapes and Patterns
xample 1 Look at the pattern below. What comes next?
? comes next.
xample 2 What comes next?
?
comes next.
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Mathematics Primary 1 Unit 2 Shapes and Patterns
ractice Look at the patterns below. Draw the correct shape in each blank to complete the pattern. 1.
?
The shape is
.
2.
?
The shape is
.
3.
?
The shape is
.
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Mathematics Primary 1 Unit 2 Shapes and Patterns
4.
?
The shape is
.
5.
?
The shape is
.
6.
?
The shape is
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.
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Mathematics Primary 1 Unit 2 Shapes and Patterns
What comes next? Circle the correct solid or shape. 7.
? The next solid is
8.
? The next shape is
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Mathematics Primary 1 Unit 2 Shapes and Patterns
9.
? The next solid is
10.
?
The next shape is
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Mathematics Primary 1 Unit 2 Shapes and Patterns
11.
?
The next shape is
12.
? The next pattern is
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