脱式计算. 4.27-1.72+0.73-2.28 1.25×8.37×0.8 7.8-7.8÷(1.3×1.5) 5.
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脱式计算.
4.27-1.72+0.73-2.28 | 1.25×8.37×0.8 |
7.8-7.8÷(1.3×1.5) | 5.28+5.28×9. |
(1)4.27-1.72+0.73-2.28
=4.27+0.73-(1.72+2.28),
=5-4,
=1;
(2)1.25×8.37×0.8
=1.25×0.8×8.37,
=1×8.37,
=8.37;
(3)7.8-7.8÷(1.3×1.5)
=7.8-7.8÷1.3÷1.5,
=7.8-6÷1.5,
=7.8-4,
=3.8;
(4)5.28+5.28×9
=(9+1)×5.28,
=10×5.28,
=52.8.
=4.27+0.73-(1.72+2.28),
=5-4,
=1;
(2)1.25×8.37×0.8
=1.25×0.8×8.37,
=1×8.37,
=8.37;
(3)7.8-7.8÷(1.3×1.5)
=7.8-7.8÷1.3÷1.5,
=7.8-6÷1.5,
=7.8-4,
=3.8;
(4)5.28+5.28×9
=(9+1)×5.28,
=10×5.28,
=52.8.
脱式计算. 4.27-1.72+0.73-2.28 1.25×8.37×0.8 7.8-7.8÷(1.3×1.5) 5.
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