Page 47 - Math Genius C3

E:\Working\Orange_Education\Math_Genius_3\Open_Files\CHAP_02
\ 01-Oct-2025 Bharat Arora Proof-10 Reader’s Sign _______________________ Date __________

5. H t O H t O 6. H t O H t O

9 2 round off 8 2 round off
+ 4 6 round off + + 4 6 round off +

Actual Sum____________Estimated Sum Actual Sum___________Estimated Sum

word problems

Let us learn the steps for solving word problems. Math Insight

r — Read Learn this mnemonic to remember
U — Understand (the problem) the steps for solving word problems.

d — Decide (the strategy — which mathematical “Red Ugly Dragon Sings Loudly.”
operation required)
S — Solve Think Tank

L — Look back (check the solution) Neha and her friends want to
buy a pen worth `150 for their
Example 1: Mohit bought a DVD player for `3545 teacher’s birthday. Here’s their
and a printer for `5499. How much money did he contribution: Neha: `58, Poonam:

spend? `40, Sneha: `34, Rashmi: `56.
Solution: To Understand: The cost of a DVD player Do Neha and her friends
have enough money to buy
and a printer is given. We have to find the total the pen? Check without actual

money Mohit spent. calculations.
To Decide: To find the total money spent, add the cost of both items.

th H t O th H t O

To Solve: Cost of DVD player (in `) = 3 5 4 5 5 4 9 9
Cost of printer (in `) = + 5 4 9 9 + 3 5 4 5

Total amount spent (in `) = 9 0 4 4 9 0 4 4

To look back (checking): Change the order of the addition.
Thus, Mohit spent `9044.

Example 2: 5735 boxes have been put into a truck. 437 more boxes can be put into it.
What is the total number of boxes that can be put into the truck?

Solution: th H t O
Number of boxes put into the truck = 5 7 3 5
Number of extra boxes that can be put into the truck = + 4 3 7

Total number of boxes = 6 1 7 2
Thus, 6172 boxes can be put into the truck.

Mathematics-3 45