9.9×4.5+0.45
=(9.9+0.1)×4.5
=10×4.5
=45
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9.9×4.5+0.45=(9.9+0.1)×4.5=10×4.5=45
9.9×4.5+0.45
=9.9×4.5+0.1x4.5
=(9.9+0.1)x4.5
=10x4.5
=45
9.9×4.5+0.45=9.9×4.5+0.1×4.5=(9.9+0.1)×4.5=10×4.5=45
9.9×4.5+0.45
=99×0.45+0.45
=0.45×(99+1)
=0.45×100
=45