Bài 1: Tính bằng cách thuận tiện:
a) 14,29 x 12,5 x 8 b) 23,42 + 49,38 + 26,58 + 0,62
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a) 14,29 x 12,5 x 8
=14,29 x (12,5x8)
=14,29 x 100
=1429
b)23,42 + 49,38 + 26,58 + 0,62
=(23,42 + 26,58) + (49,38 + 0,62)
=50+50
=100
a) \(14,29.12,5.8\) b) \(23,42+49.38+26,58+0,62\)
\(=14,29.\left(12,5.8\right)\) \(=\left(23,42+26,58\right)+\left(49,38+0,62\right)\)
\(=14,29.100\) \(=50+50\)
\(=1429\) \(=100\)