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(1)25×1.25×32
=25×1.25×4×8,
=(25×4)×(1.25×8),
=100×10,
=1000;
(2)(3.75+4.1+2.35)×9.8
=(3.75+2.35+4.1)×9.8,
=(6.1+4.1)×9.8,
=10.2×9.8,
=10.2×(10-0.2),
=10.2×10-10.2×0.2,
=102-2.04,
=99.96.
=25×1.25×4×8,
=(25×4)×(1.25×8),
=100×10,
=1000;
(2)(3.75+4.1+2.35)×9.8
=(3.75+2.35+4.1)×9.8,
=(6.1+4.1)×9.8,
=10.2×9.8,
=10.2×(10-0.2),
=10.2×10-10.2×0.2,
=102-2.04,
=99.96.
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