脱式计算,能简便的就简便. 4.13×6.7+3.3×4.13 4.31×1.25×0.8.
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(1)4.13×6.7+3.3×4.13
=4.13×(6.7+3.3)
=4.13×10
=41.3
(2)4.31×1.25×0.8
=4.31×(1.25×0.8)
=4.31×1
=43.1
=4.13×(6.7+3.3)
=4.13×10
=41.3
(2)4.31×1.25×0.8
=4.31×(1.25×0.8)
=4.31×1
=43.1
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