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我会脱式计算.0.325÷2.5+3.972.16÷3.6÷0.518.4+4.3×2.80.8×24.5-7.50.89×99+0.892.78+0.5×68.
题目详情
我会脱式计算. 0.325÷2.5+3.97 | 2.16÷3.6÷0.5 | 18.4+4.3×2.8 |
0.8×24.5-7.5 | 0.89×99+0.89 | 2.78+0.5×68. |
▼优质解答
答案和解析
①0.325÷2.5+3.97
=0.13+3.97
=4.1;
②2.16÷3.6÷0.5
=3.6÷0.5
=7.2;
③18.4+4.3×2.8
=18.4+12.04
=30.44;
④0.8×24.5-7.5
=19.6-7.5
=12.1;
⑤0.89×99+0.89
=0.89×(99+1)
=0.89×100
=89;
⑥2.78+0.5×68
=2.78+34
=36.78.
=0.13+3.97
=4.1;
②2.16÷3.6÷0.5
=3.6÷0.5
=7.2;
③18.4+4.3×2.8
=18.4+12.04
=30.44;
④0.8×24.5-7.5
=19.6-7.5
=12.1;
⑤0.89×99+0.89
=0.89×(99+1)
=0.89×100
=89;
⑥2.78+0.5×68
=2.78+34
=36.78.
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