SOLVE :-
3/5 + 2/7
VERIFY :-
18 × [ 7 + (-3) ] = [18 × 7] + [18 ×(-3) ]
WHICH IS GREATER :-
2/7 OF 3/4. OR 3/5 OF 5/8
WRITE THE FOLLOWING DECIMALS NUMBER IN EXPANDED FORM :-
(I) 20.03. (ii) 2.03
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Answers
Answer:
1.31/35
2. 72=72
3. 3/14 or 3/8 there for3/14 is big
4.a) 2×10+0×1+0×1/10+3×1/100 or 2003/100
b) 2×1+0×1/10+3×1/100 or 203/100
Explanation:
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1.
3/5+ 2/ 7 The LCM of 5 and 7 is 35. 3/5× 7/7= 21/35 2/7×5/5=10/35 Now, the numerators can be added since the denominators are equal.
2.(a) LHS =18×[7+(−3)]=18×4=72
RHS =[18×7]+[18×(−3)] =126+(−54)=72 (verified)
(b) LHS =(−21)×[(−4)+(−6)]=(−21)×(−10)=210
RHS =[(−21)×(−4)]+[(−21)×(−6)]=84+126=210 (verified)
3.Which is greater? 2/7 of 3/4 or, 3/5 of 5/8. Solution: 2/7 of 3/4
4.i) 20.03 = 2 x 10 + 0 x 1 + 0 x \frac{1}{10}
10
1
+ 3 x
ii) 2.03 = 2 x 1 + 0 x \frac{1}{10}
10
1
+ 3 x \frac{1}{100}
100
1
iii) 200.03 = 2 x 100 + 0 x 10 + 0 x 1 + 0 x \frac{1}{10}
10
1
+ 3 \ \frac{1}{100}
100
1
iv) 2.034 = 2 x1 + 0 x \frac{1}{10}
10
1
+ 3 x \frac{1}{10}
10
1
+ 4 x \frac{1}{1000}
1000
1
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