working backwards problem solving pdf

Most problems in this set require you to work backwards. Working backwards is a particularly useful method in situations when the end result of a problem is known, and one has to find the initial quantity. If you are new to any of the problem solving strategies, check out our complete overview of elementary problem solving strategies at https ...

Step 1 - Understand the problem situation and organise the information in a diagram table: Mr Ow Mr Toh Mr Sim bought 15 remaining leftremaining Step 2 –Action plan - Work backwards . Use the end number and work backwards to find the number of mangoes in the crate at first. Step 3 – Solve the problem . Start with 15 mangoes . 3 units = 15

You may use the work-backwards strategy to solve the following simple math problems as well as the story problems in this Math Challenge. Start with the end result and undo each step or reverse the operation on each step. If you are new to the Math Challenge, feel free to learn about the different problem-solving strategies at

By working backward from where you end to where you began, you can solve problems. Use the four step problem solving model to stay organized when working backward. Example 1 Jonah put half of his birthday money into his savings account. Then he paid back the $10 that he owed his brother for dance tickets. Lastly, he spent $3 on lunch at school.

Welcome to the Math Challenge #7. In this challenge, most problems can be solved by using the “Working Backwards” strategy. You will need to start with the final solution and work back one step at a time to get to the beginning. In mathematics, when we use the ‘working backward’ strategy, we can reverse the operation or use the

Work Backwards Working backwards is a particularly useful problem-solving strategy when you can clearly define the goal or end state of the problem. Maybe you also know the beginning state of the problem, or maybe you know a sequence of operations that were used in the problem. Reversing the operations and working backwards from the goal helps

Problem Solving: Working Backwards 1. Jordan is 14 years younger than Rhiannon. Ruby is 26 years older than Jordan. If Ruby is 37, how old is Rhiannon? 2. Four people weigh themselves. Young Holly was 17 kg lighter than Rachael, Max was twice as heavy as Holly and Brad was 9 kg heavier than Max. If Brad’s weight was 73 kg, what was Rachael ...

working 21i 21ii 2 marks 21 M01554_half measure Num N3a1 L5 M01554 Ð 21 October 2013 11:14 AM Ð Version 2 Total out of 4 [2 marks] 13 13 [2014] Ben thinks of a number. He adds half of the number to a quarter of the number. The result is 60 What was the number Ben first thought of? Show your working. You may get a mark. 21i 21ii 2 marks 21 19 ...

Problem Solving Strategy: Working Backwards Kevin went to a fair with his friends Matt and Colleen. Read each friend’s story to determine how much money each of them took to the fair. Kevin spent $2 on a ferris wheel ride. He bought Colleen popcorn for $1 and played ball toss 4 times trying to win a prize. Each round of ball toss cost $1.

Worked Example: Working Backwards Problem An object moves along a horizontal surface in a manner described by the two kinematics equations below. These equations cover the complete time the object is in motion. Solve the equations for the unknowns, construct a motion diagram for the situation, then construct a physical situation that is