(1)24×
+76×1 2
,1 2
=
×(76+24),1 2
=
×100,1 2
=50;
(2)87.5÷12.5÷8,
=87.5÷(12.5×8),
=87.5÷100,
=0.875;
(3(
+7 8
)÷3 4
,1 8
=
×8+7 8
×8,3 4
=7+6,
=13;
(4)91+91×(
-2 13
),1 7
=91+91×
-91×2 13
,1 7
=91+14-13,
=92;
(5)2.2×101,
=2.2×(100+1),
=2.2×100+2.2×1,
=220+2.2,
=222.2;
(6)14.6-3.625-6.375,
=14.6-(3.625+6.375),
=14.6-10,
=4.6.