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12.5×9.6×2.5×1512.5×4.8+2.5×4.482.2×10.4－0.887.3×285－73×16.5－730怎样简便计算
题目详情
12.5×9.6×2.5×15 12.5×4.8+2.5×4.48 2.2×10.4－0.88 7.3×285－73×16.5－730 怎样简便计算
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答案和解析
12.5×9.6×2.5×15
=12.5×8×2.5×4×15×0.3
=100×10×4.5
=4500
12.5×4.8+2.5×4.48
=2.5×5×4.8+2.5×4.48
=2.5×24+2.5+4.48
=2.5×28.48
=71.2
2.2×10.4－0.88
=2.2×10.4-2.2×0.4
=2.2×(10.4-0.4)
=2.2×10
=22
7.3×285－73×16.5－730
=7.3×285－7.3×165－7.3×100
=7.3×(285-165-100)
=7.3×20
=146
=12.5×8×2.5×4×15×0.3
=100×10×4.5
=4500
12.5×4.8+2.5×4.48
=2.5×5×4.8+2.5×4.48
=2.5×24+2.5+4.48
=2.5×28.48
=71.2
2.2×10.4－0.88
=2.2×10.4-2.2×0.4
=2.2×(10.4-0.4)
=2.2×10
=22
7.3×285－73×16.5－730
=7.3×285－7.3×165－7.3×100
=7.3×(285-165-100)
=7.3×20
=146
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