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E:\Working\Focus_Learning\Math_Genius_3_(11-09-2024)\Open_Files\CHAP_02
\ 12-Sep-2024 Surender Prajapati Proof-4 Reader’s Sign _______________________ Date __________
practice time 2h
Solve the following word problems
1. A school library has 1234 storybooks in Hindi, 2356 storybooks in English and 2220
books of art and craft. How many books are there in the school library?
2. A company manufactured 4617 bicycles in a year. If 2500 more bicycles were
manufactured in the next year, how many total bicycles were manufactured in both
years?
3. In a village, there are 4265 men, 4075 women and 1570 children. What is the total
number of people living in the village?
4. Radha contributes ₹125 and Rishi contributes ₹170 to buy a gift for their mother.
What is the cost of the gift?
5. A balloon seller has 248 red balloons and 173 green balloons. Estimate the total
number of balloons by rounding to the nearest 10. Is the total number of balloons
more than 400 or less than 400?
6. Jenny's school is planting flowers in school on World Earth Day. They will plant 114
daffodils, 11 tulips, and 1119 marigolds. How many flowers will they plant in all?
Encapsulate
math
AdditiON
exploring Addition Addition of 3-digit Numbers Addition of 4-digit Numbers
By expanding both the numbers. With regrouping Without regrouping
example: 145 = 100 + 40 + 5 = 657 example: example:
+512 = 500 + 10 + 2 623 + 358 = 981 2326 + 1253 = 3579
With regrouping
Addition Properties example:
Property of 0 estimating the Sum 3456 + 6345 = 9801
example: 1235 + 0 = 1235 It is a rough calculation to find the
Property of 1 sum of the given numbers.
example: 2315 + 1 = 2316 example: Actual estimated
Adding 10 to a number Sum Sum Order of Addition
example: 3235 + 10 = 3245 H t O H t O Changing the order of the addends
Adding 100 to a number does not change the final sum.
example: 4230 + 100 = 4330 1 4 9 1 5 0 243 + 125 = 125 + 243
Adding 1000 to a number + 3 5 + 4 0
example: 5235 + 1000 = 6235 1 8 4 1 9 0
46 Mathematics-3
