(1)1080-63.58-36.42
(2)7.05×37+64×7.05-7.05
(3)[(
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(4)85×0.75+15×75%(1)1080-63.58-36.42,
=1080-(63.58+36.42),
=1080-100,
=980;
(2)7.05×37+64×7.05-7.05,
=7.05×(37+64-1),
=7.05×100,
=705;
(3)[(
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=[(
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=[(
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=
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=
| 11 |
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=11;
(4)85×0.75+15×75%,
=85×0.75+15×0.75,
=(85+15)×0.75,
=100×0.75,
=75.