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8.1×12.527.36-1.43-4.36-4.570.1-0.1×[0.01÷(1-0.9)]2.3×0.48+0.48×8.7-0.48.
题目详情
8.1×12.5 | 27.36-1.43-4.36-4.57 |
0.1-0.1×[0.01÷( 1-0.9)] | 2.3×0.48+0.48×8.7-0.48. |
8.1×12.5 | 27.36-1.43-4.36-4.57 |
0.1-0.1×[0.01÷( 1-0.9)] | 2.3×0.48+0.48×8.7-0.48. |
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答案和解析
(1)8.1×12.5,
=(8+0.1)×12.5,
=100+1.25,
=101.25;
(2)27.36-1.43-4.36-4.57,
=(27.36-4.36)-(1.43+4.57),
=23-6,
=17;
(3)0.1-0.1×[0.01÷( 1-0.9)],
=0.1-0.1×[0.01÷0.1],
=0.1-0.1×0.1,
=0.1-0.01,
=0.09;
(4)2.3×0.48+0.48×8.7-0.48,
=(2.3+8.7-1)×0.48,
=10×0.48,
=4.8
=(8+0.1)×12.5,
=100+1.25,
=101.25;
(2)27.36-1.43-4.36-4.57,
=(27.36-4.36)-(1.43+4.57),
=23-6,
=17;
(3)0.1-0.1×[0.01÷( 1-0.9)],
=0.1-0.1×[0.01÷0.1],
=0.1-0.1×0.1,
=0.1-0.01,
=0.09;
(4)2.3×0.48+0.48×8.7-0.48,
=(2.3+8.7-1)×0.48,
=10×0.48,
=4.8
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