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下面各题怎样算简便就怎样算.①16.5-4.62-5.38②1.25×4×25③6.52-(1.64+2.52)④5.4÷25÷4⑤0.85×101-0.85⑥3.6÷4-0.12×5⑦(3.95-3.68)÷9⑧4.8×5-6.6
题目详情
下面各题怎样算简便就怎样算.
①16.5-4.62-5.38 | ②1.25×4×25 | ③6.52-(1.64+2.52) | ④5.4÷25÷4 |
⑤0.85×101-0.85 | ⑥3.6÷4-0.12×5 | ⑦(3.95-3.68)÷9 | ⑧4.8×5-6.6 |
▼优质解答
答案和解析
①16.5-4.62-5.38
=16.5-(4.62+5.38)
=16.5-10
=6.5;
②1.25×4×25
=1.25×(4×25)
=1.25×100
=125;
③6.52-(1.64+2.52)
=6.52-1.64-2.52
=6.52-2.52-1.64
=4-1.64
=2.36;
④5.4÷25÷4
=5.4÷(25×4)
=5.4÷100
=0.054;
⑤0.85×101-0.85
=0.85×(101-1)
=0.85×100
=85;
⑥3.6÷4-0.12×5
=0.9-0.6
=0.3;
⑦(3.95-3.68)÷9
=0.27÷9
=0.03;
⑧4.8×5-6.6
=24-6.6
=17.4.
=16.5-(4.62+5.38)
=16.5-10
=6.5;
②1.25×4×25
=1.25×(4×25)
=1.25×100
=125;
③6.52-(1.64+2.52)
=6.52-1.64-2.52
=6.52-2.52-1.64
=4-1.64
=2.36;
④5.4÷25÷4
=5.4÷(25×4)
=5.4÷100
=0.054;
⑤0.85×101-0.85
=0.85×(101-1)
=0.85×100
=85;
⑥3.6÷4-0.12×5
=0.9-0.6
=0.3;
⑦(3.95-3.68)÷9
=0.27÷9
=0.03;
⑧4.8×5-6.6
=24-6.6
=17.4.
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