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Ques 1: Fill up the blanks:
(a) Smallest 6digit number in Indo Arabic Numeration System is __________.
(b) Largest 8digit number in International Numeration System is
__________.
(c) Expanded notation of 2730145 is __________ .
(d) MDCL in HinduArabic form is written as __________ .
(e) 707 in Roman Numerals can be written as __________ .
Ans:
(a) One lakh
(b) Ninety nine million nine hundred ninety nine thousand nine hundred ninety nine.
(c) 2 × 10,00,000 + 7 × 1,00,000 + 3 × 10,000 + 0 × 1000 + 1 × 100 + 4 × 10 + 5
(d) 1650
(e) DCCVII
Ques 2: Using 2, 0, 4, 5 write largest and smallest 4digit number (without repetition).
Ans: Largest number : 5420 Smallest number : 2045
Ques 3: Fill up the blanks using > or < signs:
(i) 2347 ________ 2437 ________ 2473 ________ 2734 ________ 2743
(ii) 50725 ________ 50572 ________ 50527 ________ 50275 ________ 50257
Ans.
(i) 2347 < 2437 < 2473 < 2734 < 2743
(ii) 50725 > 50572 > 50527 > 50275 > 50257
Ques 4: Add 825432 and 543082 and write the sum according to Indo Arabic Numeration System.
Ans: Sum = 13,68,514 (Thirteen lakh sixty eight thousand five hundred and fourteen.)
Ques 5: Subtract 405235 from 995432 and write the difference according to International system of numeration.
Ans: Difference = 590,197 (Five hundred ninety thousand one hundred ninety seven.)
Ques 6: If in a garden there are 4592 flowering plants and 3257 fruit trees then what's the total number of plants in the garden?
Ans: Total number of plants = 7849
Ques 7: Evaluate : 81 [15 {7 – 2 (7 – 3)}]
Ans: –1215
Ques 8: A flask has 5 litres of lemonade. How many glasses, each of 200ml capacity, can it fill?
Ans: Number of glasses = 25
Ques 9: Estimate each of the following using general rule:
(i) 842 + 1245
(ii) 19,643 – 13,775
(iii) 2149 × 493
(iv) 5762 ÷ 287
(v) 439 + 8325 – 387
Ans:
(i) 2,000
(ii) 6,000
(iii) 10,50,000
(iv) 20
(v) 8,000
Ques 10: Fill up the blanks:
Ans:
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