2½ × 49 × 4 = (2½ × 4) × 49 = 10 × 49 = 490.
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Yes, that's quite correct.Two thirds is four thirds less than two wholes,and two thirds is one sixth more than a half.
Two lots of one-fourths equals a half.
Two and a half times two equals five. To calculate it, you multiply 2.5 by 2, which gives you 5.
One half times two (or 1/2 x 2) equals one (1) !
17/3 x 5/2 = 85/6 or 14 and 1/6