解
6.25×7×8
=6.25×4×2×7
=25×2×7
=350
2.05×6.53-2.05×0.33
=2.05×(6.53-0.33)
=2.05×6.2
=2.05×(6+0.2)
=2.05×6+2.05×0.2
=12.3+0.41
=12.71
解
6.25×7×8
=6.25×4×2×7
=25×2×7
=350
2.05×6.53-2.05×0.33
=2.05×(6.53-0.33)
=2.05×6.2
=2.05×(6+0.2)
=2.05×6+2.05×0.2
=12.3+0.41
=12.71