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脱式计算,能简算的要简算.7.5×2+1.25÷0.598×7.580÷0.25+0.7519×3.8+3.81.25×3.4×0.85.12÷0.4÷2.5
题目详情
脱式计算,能简算的要简算.
脱式计算,能简算的要简算.
7.5×2+1.25÷0.5 98×7.5 80÷0.25+0.75 19×3.8+3.8 1.25×3.4×0.8 5.12÷0.4÷2.5 7.5×2+1.25÷0.5 98×7.5 80÷0.25+0.75 7.5×2+1.25÷0.5 98×7.5 80÷0.25+0.75 19×3.8+3.8 1.25×3.4×0.8 5.12÷0.4÷2.5 19×3.8+3.8 1.25×3.4×0.8 5.12÷0.4÷2.5
7.5×2+1.25÷0.5 | 98×7.5 | 80÷0.25+0.75 |
19×3.8+3.8 | 1.25×3.4×0.8 | 5.12÷0.4÷2.5 |
7.5×2+1.25÷0.5 | 98×7.5 | 80÷0.25+0.75 |
19×3.8+3.8 | 1.25×3.4×0.8 | 5.12÷0.4÷2.5 |
7.5×2+1.25÷0.5 | 98×7.5 | 80÷0.25+0.75 |
19×3.8+3.8 | 1.25×3.4×0.8 | 5.12÷0.4÷2.5 |
▼优质解答
答案和解析
(1)7.5×2+1.25÷0.5
=15+2.5
=17.5;
(2)98×7.5
=(100-2)×7.5
=100×7.5-2×7.5
=750-15
=735;
(3)80÷0.25+0.75
=320+0.75
=320.75;
(4)19×3.8+3.8
=(19+1)×3.8
=20×3.8
=76;
(5)1.25×3.4×0.8
=1.25×0.8×3.4
=1×3.4
=3.4;
(6)5.12÷0.4÷2.5
=5.12÷(0.4×2.5)
=5.12÷1
=5.12.
=15+2.5
=17.5;
(2)98×7.5
=(100-2)×7.5
=100×7.5-2×7.5
=750-15
=735;
(3)80÷0.25+0.75
=320+0.75
=320.75;
(4)19×3.8+3.8
=(19+1)×3.8
=20×3.8
=76;
(5)1.25×3.4×0.8
=1.25×0.8×3.4
=1×3.4
=3.4;
(6)5.12÷0.4÷2.5
=5.12÷(0.4×2.5)
=5.12÷1
=5.12.
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