3.89÷0.13怎么做?
计算下面各题,怎样简便就怎样算.0.25×0.03×40.13×3.89+0.13×5.1110.1×877.35÷0.125÷8....
计算下面各题,怎样简便就怎样算. 0.25×0.03×4 0.13×3.89+0.13×5.11 10.1×87 7.35÷0.125÷8.
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(1)0.25×0.03×4
=0.25×4×0.03
=1×0.03
=0.03;
(2)0.13×3.89+0.13×5.11
=(3.89+5.11)×0.13
=9×0.13
=1.17;
(3)10.1×87
=(10+0.1)×87
=10×87+0.1×87
=870+8.7
=878.7;
(4)7.35÷0.125÷8
=7.35÷(0.125×8)
=7.35÷1
=7.35.
=0.25×4×0.03
=1×0.03
=0.03;
(2)0.13×3.89+0.13×5.11
=(3.89+5.11)×0.13
=9×0.13
=1.17;
(3)10.1×87
=(10+0.1)×87
=10×87+0.1×87
=870+8.7
=878.7;
(4)7.35÷0.125÷8
=7.35÷(0.125×8)
=7.35÷1
=7.35.
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