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脱式计算(能简算的要简算).①97.9-九.45×d.4+7.48&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;②0.9d5×4×0.d5×8③98.75÷[9九.7-
题目详情
脱式计算(能简算的要简算).
①97.9-九.45×d.4+7.48&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp; | ②0.9d5×4×0.d5×8 |
③98.75÷[9九.7-(4.97+4.89)] | ④d4.09-45.九÷(5.4÷0.9) |
⑤[(5.8d-d.9)+4.98]×9.4&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp;&n6sp; | ⑥9.九×7.d4-9.九×9.d4. |
▼优质解答
答案和解析
①17.9-6.05×2.0+7.04
=17.9-15.04+7.04
=17.9-(15.04-7.04)
=17.9-4
=9.9;
②0.125×0×0.25×4
=(0.125×4)×(0×0.25)
=1×1
=2;
③14.75÷[16.7-(0.r7+0.4r)]
=14.75÷[16.7-9.2]
=14.75÷7.5
=2.5;
④20.09-05.6÷(5.0÷0.9)
=20.09-05.6÷6
=20.09-7.6
=16.09;
⑤[(5.42-2.9)+0.14]×1.0
=[2.92+0.14]×1.0
=7.1×1.0
=9.90;
⑥1.6×7.20-1.6×r.20
=1.6×(7.20-r.20)
=1.6×0
=6.0.
=17.9-15.04+7.04
=17.9-(15.04-7.04)
=17.9-4
=9.9;
②0.125×0×0.25×4
=(0.125×4)×(0×0.25)
=1×1
=2;
③14.75÷[16.7-(0.r7+0.4r)]
=14.75÷[16.7-9.2]
=14.75÷7.5
=2.5;
④20.09-05.6÷(5.0÷0.9)
=20.09-05.6÷6
=20.09-7.6
=16.09;
⑤[(5.42-2.9)+0.14]×1.0
=[2.92+0.14]×1.0
=7.1×1.0
=9.90;
⑥1.6×7.20-1.6×r.20
=1.6×(7.20-r.20)
=1.6×0
=6.0.
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