Maths Lesson 3 Subtracting Decimal Numbers Mental Maths

Maths Lesson 3 – Subtracting Decimal Numbers Mental Maths Practice See if you can put these decimals in order from smallest to largest! T. Goodoree, youtube & Twinkl, March. April 2020

Maths Lesson 3 – Subtracting Decimal Numbers Mental Maths Practice - ANSWERS Lift me! How did you get on with these mental problems? Traffic light / assess your work! T. Goodoree, youtube & Twinkl, March. April 2020

Maths Lesson 3 – Subtracting Decimal Numbers Watch this tutorial first! Subtracting decimal numbers https: //youtu. be/w 3 smf. Qko 4 QM? t=65# Notice how the teacher checks whether his answer is reasonable! What does he do to the numbers in question 1, to check if his answer is reasonable and he is on the right track? ROUNDING LIFT ME! FIRST! You might need to press escape first if you’re in full screen mode! T. Goodoree, youtube & Twinkl, March. April 2020

Maths Lesson 3 – Subtracting Decimal Numbers Look carefully at this example! Sometimes, especially in decimal subtraction, it is helpful to Place a ‘ 0’ where a digit is not given… Remember, ‘ 0 ’ is a place-holder. It is not changing the value of the number if it’s at the end! Now have a go at this problem! Remember, you may need to exchange (‘borrow from’) the number on the left if you can’t do the subtraction T. Goodoree, youtube & Twinkl, March. April 2020

Maths Lesson 3 – Subtracting Decimal Numbers WORKING AND ANSWER! • Did you get the correct answer? • If you did make a mistake, can you see where it is? T. Goodoree, youtube & Twinkl, March. April 2020

Maths Lesson 3 – Adding Decimal Numbers Now try these independent tasks. Move onto the next level if you find your group problem easy! Purple White Black Use the column method. Remember, you can add the ‘ 0’ at the very end of a number without changing its value! Show your working out clearly, including the exchanging! T. Goodoree, youtube & Twinkl, March. April 2020

Maths Lesson 3 – Subtracting Decimal Numbers Now try this In-Depth! Elliot went to the shop to buy some milk. He bought 4 pints for £ 1. 39, along with a bar of chocolate for 85 p. He paid the cashier with a £ 5 note. How much change was Elliot given? Show your full working out. There should be a calculation for each stage of the problem. How many steps does this problem have? T. Goodoree, youtube & Twinkl, March. April 2020

Maths Lesson 3 – Subtracting Decimal Numbers In-Depth solution! me! £ 2. 76 was Lift Elliot’s change! T. Goodoree, youtube & Twinkl, March. April 2020

Maths Lesson 3 – Adding Decimal Numbers ANSWERS TO SLIDE 26: Purple White T. Goodoree, youtube & Twinkl, March. April 2020 Black