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怎么简便就怎么算.0.125×321.25×213×0.83.26×5.7-3.26×0.756.5×99+56.50.78×10119.625-(4.716+9.625)
题目详情
怎么简便就怎么算.
0.125×32 | 1.25×213×0.8 | 3.26×5.7-3.26×0.7 |
56.5×99+56.5 | 0.78×101 | 19.625-(4.716+9.625) |
▼优质解答
答案和解析
(1)0.125×32
=0.125×(8×4)
=(0.125×8)×4
=1×4
=4;
(2)1.25×213×0.8
=1.25×0.8×213
=1×213
=213;
(3)3.26×5.7-3.26×0.7
=3.26×(5.7-0.7)
=3.26×5
=16.3;
(4)56.5×99+56.5
=56.5×(99+1)
=56.5×100
=5650;
(5)0.78×101
=0.78×(100+1)
=0.78×100+0.78×1
=78+0.78
=78.78;
(6)19.625-(4.716+9.625)
=19.625-4.716-9.625
=19.625-9.625-4.716
=10-4.716
=5.284.
=0.125×(8×4)
=(0.125×8)×4
=1×4
=4;
(2)1.25×213×0.8
=1.25×0.8×213
=1×213
=213;
(3)3.26×5.7-3.26×0.7
=3.26×(5.7-0.7)
=3.26×5
=16.3;
(4)56.5×99+56.5
=56.5×(99+1)
=56.5×100
=5650;
(5)0.78×101
=0.78×(100+1)
=0.78×100+0.78×1
=78+0.78
=78.78;
(6)19.625-(4.716+9.625)
=19.625-4.716-9.625
=19.625-9.625-4.716
=10-4.716
=5.284.
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