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简介:
43.21+98.76+56.79+1.24
=(43.21+56.79)+(98.76+1.24)
=100+100
=200
6.3+15.4+0.09+3.7+14.6
=(6.3+3.7)+(14.6+15.4)+0.09
=40+0.09
=40.09
34.65-0.99-0.97
=34.65-1-1+(0.01+0.03)
=32.65+0.04
=32.69
19.826-1.173-5.248-3.405
=19.826-(1.173+5.248+3.405 )
=19.826-9.826
=10