Mathematics 40 Grade 1 Practice 1. Subtract by crossing out. (a) 5 – 2 = Activity CORNER Things needed: 1. Work in pairs. 2. Take a subtraction card and show it. 3. Subtract by crossing out using building blocks. Addition cards Subtraction cards Building blocks 4. Then, subtract again using number bonds. 5. Is your answer correct? 6. Repeat with all the subtraction cards. (b) 7 – 5 =
CHAPTER 4 Subtraction within 10 41 3. Subtract by using number bonds. (a) 5 – 1 = (b) 7 – 4 = 1 5 7 2. Subtract by using number lines. (a) 4 – 1 = (b) 6 – 2 = (c) 10 – 6 = (c) 9 – 4 = (d) 10 – 8 = 0 1 –1 2 3 4 4 5 6 7 8 9 10 0 1 2 3 4 5 6 6 7 8 9 10
Mathematics 42 Grade 1 C Subtraction involving 0 There are 5 bicycles. Nobody rides the bicycles. So, all the 5 bicycles are left standing. Then, 5 children ride away on the 5 bicycles. So, none of the bicycles are left. Practice Fill in the blanks. 1. 1 – 0 = 2. 6 – = 0 3. – 0 = 9 5 – 0 = 5 5 – 5 = 0 5 – 0 = 5 When you subtract 0 from a number, the number remains the same. When you subtract a number from itself, the result is 0. watch me
CHAPTER 4 Subtraction within 10 43 D Making subtraction stories Practice Make subtraction stories based on the pictures below. There are 5 apples. 2 apples are rotten. 2 3 5 There are cupcakes. cupcakes are eaten. cupcakes are left. – = There are balloons. balloons are red. balloons are green. – = 1. 2. 5 – 2 = 3 3 good apples are left. watch me
Mathematics 44 Grade 1 There are 9 candles. 3 candles are not lit. How many candles are lit? 6 candles are lit. 9 – 3 = Solve the following problems. 1. Nick has 9 crayons. He gives 7 of them to his sister. How many crayons does Nick have left? 9 – 7 = Nick has crayons left. 2. The farmer has 8 goats. He sells 3 of them. How many goats does he have left? – = He has goats left. E Solving word problems 3 6 9 watch me 0 1 2 3 – 3 4 5 6 7 8 9 9 10 Practice
CHAPTER 4 Subtraction within 10 45 F Making fact families How many balloons are there altogether? 3 + 2 = 5 or 2 + 3 = 5 How many balloons are blue? 5 – 2 = 3 How many balloons are red? 5 – 3 = 2 3 + 2 = 5 5 – 2 = 3 2 + 3 = 5 5 – 3 = 2 Practice There is an inverse relationship between addition and subtraction. They make up a fact family. 3 2 5 Write a fact family for the picture below. + = + = – = – = watch me
Mathematics 46 Grade 1 ASK IMAGINE PLAN Snakes and ladders (part 3) You have successfully made your own board games previously. The first one involves the basic numbers 0 to 10. The second one is slightly challenging as it involves some addition problems. Now, you are required to improve one of your previous board games by • changing its pattern or style, • adding subtraction problems involving numbers 0 to 9. It must be a mobile game, and easy to set up. You should be able to play it anytime and anywhere. Suggested materials: cardboard ruler pencil dice crayons Tips: 1. You can use a spinning wheel with numbers instead of a dice as it will be more interesting. 2. You can change either the number on the dice or the number of dice in your new game so that you can apply the addition and subtraction operations. Activity
CHAPTER 4 Subtraction within 10 47 CREATE IMPROVE PRESENT
Chapter 5 Ordinal numbers Can you tell the position of each runner? You should be able to • name positions using words such as "before", "after", "next to" and "between" • understand the left and right positions • understand ordinal numbers like first, second, third, etc. • use symbols like 1st, 2nd, 3rd, etc. Learning Outcomes http://bit.do/IMPT1-C5-MO-1 http://bit.do/IMPT1-C5-MO-2 http://bit.do/IMPT1-C5-MO-3 4 http://bit.do/IMPT1-C5-MO-4 Maths Online Maths Online Maths Online Maths Online Maths Online 2 3 4
CHAPTER 5 Ordinal numbers 49 A Knowing ordinal numbers Can you name the positions of all the swimmers using before, between and after? There are 5 swimmers in the pool. 4th Fourth Alice Nora Joe Mina Sue 3rd Third 5th Fifth 2nd Second 1st First Joe is 1st. Joe is before Mina. Mina is 2nd. Nora is 3rd. Nora is after Mina. Mina is between Joe and Nora. Alice is 4th. Sue is 5th. Sue is the last. watch me
Mathematics 50 Grade 1 Look at the picture below. Fill in the blanks. First Second Third Fourth Fifth 6th Sixth 7th Seventh 8th Eighth 9th Ninth 10th Tenth
CHAPTER 5 Ordinal numbers 51 Practice 1. Fill in the blanks. Julie Tom May Bella Ben (a) is first. (b) Tom is Julie and May. (c) Bella is . (d) May is Tom. (e) is after Bella. 2. Write the ordinal numbers in words. 5th 7th 3rd 8th 1st 4th 10th 6th 2nd 9th
Mathematics 52 Grade 1 B Naming left and right positions Soda Ice cream Juice Milk Soda Burger The ice cream is first from the left. The juice is second from the left. It is also next to the ice cream. The burger is the fifth from the left. It is also last from the left. The milk is third from the left. It is also third from the right. The soda is between the milk and the burger. watch me
CHAPTER 5 Ordinal numbers 53 Practice Fill in the blanks. 1. Who is 1st from the right? 2. is second from the left. She is also from the right. 3. Chris is from the right. He is Bella and Dory. 4. Counting from the left, who is next to Edward? who is next to Chris? 5. is last from the right. He is also next to . Alex Bella Chris Dory Edward Fiona Left Right
JBRB211031 ISBN 978-981-17075-6-8 MINDS-ON MATHS is a series of textbooks with accompanying workbooks, specially designed to meet the requirements of the latest Indonesian Maths syllabus. The Singapore Maths Method which is proven to be one of the most effective teaching approaches in the world is adopted for content enhancement. This series encourages active learning and practices so that pupils’ mathematical fluency can be developed through questions and activities infused with heuristic and modelling techniques, critical thinking, logical reasoning and metacognitive skills. MINDS-ON MATHS comprises: Textbook Workbook Teacher’s Guide Digital Handbook SPECIAL FEATURES Chapter Opener : provides an engaging introduction to the topics and concepts in the upcoming chapter Learning Outcomes : states the learning objectives in each chapter Maths Online : lists suitable websites that offer learning activities using information technology Practice : provides exercises to reinforce pupils’ grasp of new concepts learnt Watch Me : directs pupils to the carefully selected videos online for further reinforcement and mastery of concepts Activity Corner : offers suggestions for hands-on activities Let’s Think! : challenges pupils to answer non-routine questions Stem Activity : provides an activity that engages in the application of knowledge of scientists, mathematicians and engineers Quick Quiz : provides printable online maths quizzes for pupils to boost their maths knowledge Maths Battle : contains different types of online activities and games that promote peer interaction and collaborative learning 21st Century Learning Components: