原式=(0.5×0.2)×(0.8×1.25)×(0.04×0.025)

=0.1×1×0.001

=0.0001

原式=(4.6÷4.6)×(72÷72)×(53÷53)

=1×1×1

=1

原式=（5.6÷0.7）×（16.5÷1.1）

=8×15

=120

原式=（152.3-31.15-21.15）×4.8

=100×4.8

=480

原式=2.4×7.6+6.5×7.6＋0.76＋7.6

=7.6×（2.4+6.5+0.1+1）

=7.6×10

=76

原式=6.3×27＋1.9×21

=7×0.9×3×9+1.9×3×7

=(7×3)×(0.9×9+1.9)

=21×10

=210

原式=0.0495×2500＋495×0.24+51×4.95

=495×（0.25+0.24+0.51）

=495×1

=495