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Maths 2 Marks Questions

Decimals · CBSE STD 7 (CBSE - English Medium). 81 questions.

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2 Marks Questions

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Question 12 Marks
Divide:
$156.8 ÷ 200$
Answer
$156.8 \div 200=\frac{156.8}{200}=\frac{156.8\times100}{200\times10}$
$=\frac{156.8}{2000}=\frac{784}{100}$
$=0.784$
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Question 32 Marks
A bottle holds $925\ g$ of jam. How many kg of jam will be there in $25$ such bottles$?$ Give the answer in kg.
Answer
Quantity of jam in one bottle $= 925$
Quantity of jam in $25$ bottles $= 925 × 25\ g = 23135\ g = 23.125\ kg$
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Question 52 Marks
Find the product:
$0.045 \times 2.4$
Answer
$0.045 \times 2.4 = 0.1080 = 0.108 \{$Sum of decimal places $= 3 + 1 = 4\}$
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Question 62 Marks
Divide: $0.8085$ by $0.35$
Answer
$0.8085\div0.35=\frac{0.8085}{0.35}$
$=\frac{0.8085\times100}{0.35\times100}=\frac{80.85}{35}$
Now, we have

$\therefore\frac{0.8085}{0.35}=\frac{80.85}{35}=2.31$
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Question 72 Marks
A car can cover a distance of $8.6\ km$ on one litre of petrol. How far can it go on $36.5$ litres of petrol$?$
Answer
Distance covered in one litre $= 8.6\ km$
Distance covered in $36.5$ litres $= 8.6 × 36.5\ km$
$= 313.90\ km = 313.9\ km$
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Question 82 Marks
Divide:
$0.196$ by $1.4$
Answer
$0.196\div1.4=\frac{0.196}{1.4}=\frac{0.196\times10}{1.4\times10}$
$=\frac{1.06}{14}=0.14$
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Question 92 Marks
A taxi driver charges $Rs. 9.80/km.$ How much will he the charges for a journey of $106.5\ km?$
Answer
Charges for $1\ km = Rs. 9.80$
Charges for $106.5\ km = Rs. 9.80 \times 106.5 = Rs. 1043.700 = Rs. 1043.70$
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Question 102 Marks
Find the product: $0.623 \times 0.75$
Answer
$0.623 \times 0.75 = 0.46725 \{$Sum of decimal places $= 3 + 2 = 5\}$​​​​​​​
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Question 122 Marks
If one drum can hold $16.850$ litres of oil, how many litres can $48$ such drums hold$?$
Answer
Oil in one drum $= 16.850$ litres
Oil in $48$ drums $= 16.850 \times 48 = 808.800 = 808.800$ litres.
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Question 132 Marks
Divide: $16.46 ÷ 20$
Answer
$16.46 \div 20=\frac{16.46}{20}=\frac{16.46\times100}{20\times100}$ $=\frac{16.46}{2\times1000}=\frac{823}{1000}$ $=0.823$
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Question 162 Marks
Find the product: $4.125 \times 86$
Answer
$4.125 \times 86 = 354.750 ($Three places of decimal$) = 354.75$
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Question 172 Marks
Find the product: $0.8 \times 3.5 \times 0.05$
Answer
$0.8 \times 3.5 \times 0.05 = 0.1400 = 0.14$
$\{$Sum of decimal places $= 1 + 1 + 2 = 4\}$
$\ \ \ 280\\\times\ \ 5\\\overline{1400}$
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Question 182 Marks
Divide: $204$ by $0.17$
Answer
$204\div0.17=\frac{204}{0.17}$
$=\frac{204\times100}{0.17\times100}=\frac{20400}{17}$
$=\frac{12\times100}{2}=1200$
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Question 212 Marks
Divide:
$21.976$ by $1.64$
Answer
$21.976\div1.64=\frac{21.976}{1.64}$ $=\frac{21.976\times100}{1.64\times100}=\frac{2197.6}{164}$ Now, we have
$\therefore\frac{21.976}{1.64}=\frac{2197.6}{164}=13.4$
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Question 232 Marks
Divide: $16.578$ by $5.4$
Answer
$16.578\div5.4=\frac{16.578}{5.4}$
$=\frac{16.578\times10}{5.4\times10}=\frac{165.78}{54}$
Now, we have

$\therefore\frac{16.578}{5.4}=\frac{165.78}{54}=3.07$
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Question 242 Marks
Divide: $11.04$ by $1.6$
Answer
$11.04\div1.6=\frac{11.04}{1.6}$
$=\frac{11.04\times10}{1.6\times10}=\frac{110.4}{16}$ Now, we have

$\therefore\frac{11.04}{1.6}=\frac{110.4}{13}=6.9$
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Question 252 Marks
Divide: $0.288$ by $0.9$
Answer
$0.288\div0.9=\frac{0.288}{0.9}$
$=\frac{0.288\times10}{0.9\times10}=\frac{2.88}{9}$
Now, we have

$\therefore\frac{0.288}{0.9}=\frac{2.88}{9}=0.32$
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Question 262 Marks
A bag of wheat weighs $97.8\ kg.$ How much wheat is contained in $500$ such bags$?$
Answer
Weight of wheat in one bag $= 97.8\ kg$
weight of wheat in $500$ bags $= 97.8 × 500\ kg = 48900.0\ kg = 48900\ kg$
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Question 272 Marks
If the cost of a pen is $Rs. 32.50,$ find the cost of $24$ such pens.
Answer
Cost of $1$ pen $= Rs. 32.50$
$\therefore$ Cost of $24$ such pens $= Rs. (32.50 \times 24) = Rs. 780$
Hence, the cost of $24$ pens is $Rs. 780$
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Question 302 Marks
Find the product: $13 \times 1.3 \times 0.13$
Answer
$13 \times 1.3 \times 0.13 = 2.197 \{$Sum of decimal places $= 1 + 2 = 3\}$​​​​​​​
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Question 312 Marks
$1\ kg$ of rice costs $Rs. 56.80.$ What is the cost of $16.25\ kg$ of rice$?$
Answer
Cost of $1\ kg$ rice $= Rs. 56.80$
Cost of $16.25\ kg$ of rice $= Rs. 56.80 \times 16.25$
$= Rs. 923.0000 = Rs. 923.$
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Question 322 Marks
A tin of oil weights $16.8\ kg.$ What is the weight of $45$ such tins of oil?
Answer
Weight of one tin of oil $= 16.8\ kg$ Weight of $45$ tins $= 16.8 \times 45\ kg = 756.0\ kg = 756\ kg$
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Question 342 Marks
Find the product: $0.54 \times 0.27$
Answer
$0.54 \times 0.27 = 0.1458$
$\{$Sum of decimal places $= 2 + 2 = 4\}$
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Question 352 Marks
Divide: $6.612$ by $11.6$
Answer
$6.612\div11.6=\frac{6.612}{11.6}$ $=\frac{6.612\times10}{11.6\times10}=\frac{66.12}{116}$ Now, we have
$\therefore\frac{6.612}{11.6}=\frac{66.12}{116}=0.57$
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Question 362 Marks
$1$ metre of cloth costs $Rs. 108.50.$ What is the cost of $18.5$ metres of this cloth$?$
Answer
Cost of one metre of cloth $= Rs. 108.5$
$0$ Cost of $18.5$ metres of cloth $= Rs. 108.50 \times 18.5 = Rs. 2007.250 = Rs. 2007.25$​​​​​​​
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Question 382 Marks
Divide: $403.8 ÷ 30$
Answer
$403.8 \div 30=\frac{403.8}{30}=\frac{403.8\times10}{30\times10}$
$=\frac{403.8}{3\times100}=\frac{13.46}{100}$
$=13.46$
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Question 392 Marks
Find the product: $104.06 \times 75$
Answer
$104.06 \times 75 = 7804.50 ($Two places of decimal$) = 7804.5$
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Question 402 Marks
Find the product: $3.45 \times 6.3$
Answer
$3.45 \times 6.3 = 21.735 \{$Sum of decimal places $= 2 + 1 = 3\}$
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Question 432 Marks
Divide: $3.28$ by $0.8$
Answer
$3.28\div0.8=\frac{3.28}{0.8}$
$=\frac{3.28\times10}{0.8\times10}=\frac{32.8}{8}$
Now, we have

$\therefore\frac{3.28}{0.8}=\frac{32.8}{8}=4.1$
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Question 452 Marks
Convert the following as a mixed fraction: $6.004$
Answer
$6.004=\frac{6004}{1000}=\frac{6004\div4}{1000\div4}$ $=\frac{1501}{250}=6\frac{1}{250}$
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Question 462 Marks
Divide: $2.0484$ by $0.18$
Answer
$2.0484\div0.18=\frac{2.0484}{0.18}$
$=\frac{2.0484\times100}{0.18\times100}=\frac{204.84}{18}$
Now, we have


$\therefore\frac{2.0484}{0.18}=\frac{204.84}{18}=11.38$
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Question 472 Marks
Find the weight of $16$ bags of sugar, each weighing $48.450\ kg.$
Answer
Weight of one bag $= 48.450\ kg$
Weight of $16$ bags $= 48.450 \times 16 = 775.200\ kg$
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Question 492 Marks
Find the product:
$2.4 \times 1.5 \times 2.5$
Answer
$2.4 \times 1.5 \times 2.5 = 9.000 = 9 \{$Sum of decimal places $= 1 + 1 + 1 = 3\}$
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2 Marks Questions - Maths STD 7 Questions - Vidyadip