用转化的方法计算。
630×0.27+1.9×21 2.4×4.6+6.5×4.6+4.6×1.1
0.0495×2500+495×0.24+51×4.95
630×0.27+1.9×21 2.4×4.6+6.5×4.6+4.6×1.1
0.0495×2500+495×0.24+51×4.95

递等式计算,能简便运算的要简便运算。
47.5÷(2.5×0.475)
0.25×0.32×1.25
(8.25﹣7
)÷(2.7﹣2.66)
15.5﹣15.5×1.5÷15.5×1.5
6.25×7.4+0.26×62.5﹣6
47.5÷(2.5×0.475)
0.25×0.32×1.25
(8.25﹣7

15.5﹣15.5×1.5÷15.5×1.5
6.25×7.4+0.26×62.5﹣6
