脱式计算,能简算的要简算.
|
(1)0.25×[(2.8+4.4)÷1.2],
=0.25×[7.2÷1.2],
=0.25×6,
=1.5;
(2)3.7×9.16+6.3×9.16,
=(3.7+6.3)×9.16,
=10×9.16,
=91.6;
(3)[32-(1.95-1.95)]÷1.6,
=[32-0]÷1.6,
=32÷1.6,
=20;
(4)5.7×10.1,
=5.7×(10+0.1),
=5.7×10+5.7×0.1,
=57+0.57,
=57.57.
脱式计算,能简算的要简算.
|
(1)0.25×[(2.8+4.4)÷1.2],
=0.25×[7.2÷1.2],
=0.25×6,
=1.5;
(2)3.7×9.16+6.3×9.16,
=(3.7+6.3)×9.16,
=10×9.16,
=91.6;
(3)[32-(1.95-1.95)]÷1.6,
=[32-0]÷1.6,
=32÷1.6,
=20;
(4)5.7×10.1,
=5.7×(10+0.1),
=5.7×10+5.7×0.1,
=57+0.57,
=57.57.