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is this of 7th class maths
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Answer:(a) 8*[7+(-3)] = [18*7] +[18*(-3)]
18*(7-3) = 126 - 54
18*4 = 72
72 = 72
(b) (-21) * [ (-4) + (-6 )] = [ (-21) * (-4) ] + [(-21) * (-6) ]
(-21) * [ -4 -6 ] = [ -84 ] + [ -126 ]
( -21) * (-10) = -84 - 126
- 210 = -210
Hence both the questions are verified.
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