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Byju's Answer

Standard VI

Mathematics

Estimating Sum or Difference

Simplify: i ...

Question

Simplify:
i) $45 + (- 12) - 12$
ii) $123 + 89 - (- 11)$
iii) $- 85 - 15 + 200$
iv) $96 + (- 16) - (- 20)$
v). $36 - (- 14) + 25$
vi) $155 + (- 25) + 50$
vii) $23 + (- 56) - (- 56)$
viii) $45 - 85 - 15 + (- 25)$
ix) $78 - 39 + (- 19) - (- 29)$
x) $450 - 255 + (- 230) + 560$

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Solution

(i) 45+(-12)-12
= 45-12-12
= 45-24
= 21

(ii) 123+89-(-11)
= 123+89+11
=293

(iii) -85-15+200
=-100+200
=100

(iv) 96+(-16)-(-20)
= 96-16+20
= 116-16
=100

(v) 36-(-14)+25
= 36+14+25
=75

(vi) 155+(-25)+50
= 155-25+50
= 205-25
= 180

(vii) 23+(-56)-(-56)
= 23-56+56
= 79-56
= 23

(viii) 45-85-15+(-25)
= 45-85-15-25
= 45-125
=-80

(ix) 78-39+(-19)-(-29)
=75-39-19+29
= 107-58
=49

(x) 450-255+(-230)+560
= 450-255-230+560
= 1010-485
=525

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Similar questions

Q. Simplify:

(i)

\frac{2}{3} + \frac{3}{4} + \frac{1}{2}

(ii)

\frac{5}{8} + \frac{2}{5} + \frac{3}{4}

(iii)

\frac{3}{10} + \frac{7}{15} + \frac{3}{5}

(iv)

\frac{3}{4} + \frac{7}{16} + \frac{5}{8}

(v)

4 \frac{2}{3} + 3 \frac{1}{4} + 7 \frac{1}{2}

(vi)

7 \frac{1}{3} + 3 \frac{2}{3} + 5 \frac{1}{6}

(vii)

7 + \frac{7}{4} + 5 \frac{1}{6}

(viii)

\frac{5}{6} + 3 + \frac{3}{4}

(ix)

\frac{7}{18} + \frac{5}{6} + 1 \frac{1}{12}

Q. Simplify:
(i)

\frac{8}{9} + \frac{- 11}{6}

(ii)

3 + \frac{5}{- 7}

(iii)

\frac{1}{- 12} + \frac{2}{- 15}

(iv)

\frac{- 8}{19} + \frac{- 4}{57}

(v)

\frac{7}{9} + \frac{3}{- 4}

(vi)

\frac{5}{26} + \frac{11}{- 39}

(vii)

\frac{- 16}{9} + \frac{- 5}{12}

(viii)

\frac{- 13}{8} + \frac{5}{36}

(ix)

0 + \frac{- 3}{5}

(x)

1 + \frac{- 4}{5}

Q. Simplify:
(i)

(\frac{25}{8} \times \frac{2}{5}) - (\frac{3}{5} \times \frac{- 10}{9})

(ii)

(\frac{1}{2} \times \frac{1}{4}) + (\frac{1}{2} \times 6)

(iii)

(- 5 \times \frac{2}{15}) - (- 6 \times \frac{2}{9})

(iv)

(\frac{- 9}{4} \times \frac{5}{3}) + (\frac{13}{2} \times \frac{5}{6})

(v)

(\frac{- 4}{3} \times \frac{12}{- 5}) + (\frac{3}{7} \times \frac{21}{15})

(vi)

(\frac{13}{5} \times \frac{8}{3}) - (\frac{- 5}{2} \times \frac{11}{3})

(vii)

(\frac{13}{7} \times \frac{11}{26}) - (\frac{- 4}{3} \times \frac{5}{6})

(viii)

(\frac{8}{5} \times \frac{- 3}{2}) + (\frac{- 3}{10} \times \frac{11}{16})

Solve:
(i) $- 96 \div 16$
(ii) $98 \div - 28$
(iii) $- 51 \div 68$
(iv) $38 \div - 57$
(v) $- 85 \div 20$
(vi) $- 150 \div - 25$
(vii) $100 \div 60$
(viii) $9 \div - 54$
(ix) $78 \div 65$
(x) $- 5 \div - 315$

Q. Multiply:

(i) 16 by 9
(ii) 18 by − 6
(iii) 36 by − 11
(iv) − 28 by 14
(v) − 53 by 18
(vi) − 35 by 0
(vii) 0 by − 23
(viii) − 16 by − 12
(ix) − 105 by − 8
(x) − 36 by − 50
(xi) − 28 by − 1
(xii) 25 by − 11

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Simplify: i) 45+(−12)−12ii) 123+89−(−11)iii) −85−15+200iv) 96+(−16)−(−20)v).36−(−14)+25vi) 155+(−25)+50vii) 23+(−56)−(−56)viii) 45−85−15+(−25)ix) 78−39+(−19)−(−29)x) 450−255+(−230)+560

Simplify:
i) $45 + (- 12) - 12$
ii) $123 + 89 - (- 11)$
iii) $- 85 - 15 + 200$
iv) $96 + (- 16) - (- 20)$
v). $36 - (- 14) + 25$
vi) $155 + (- 25) + 50$
vii) $23 + (- 56) - (- 56)$
viii) $45 - 85 - 15 + (- 25)$
ix) $78 - 39 + (- 19) - (- 29)$
x) $450 - 255 + (- 230) + 560$