脱式计算.(能简算的要简算)12.56-6.64-3.36 45.5-(0.98+5.5)13....
脱式计算.(能简算的要简算)12.56-6.64-3.3645.5-(0.98+5.5)13.6+7.94+6.410+0.009+0.19115-3.7-4.643.1...
脱式计算.(能简算的要简算)12.56-6.64-3.36 45.5-(0.98+5.5)13.6+7.94+6.410+0.009+0.191 15-3.7-4.64 3.15+1.83+6.85+2.17.
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(1)12.56-6.64-3.36
=12.56-(6.64+3.36)
=12.56-10
=2.56
(2)45.5-(0.98+5.5)
=45.5-5.5-0.98
=40-0.98
=39.02
(3)13.6+7.94+6.4
=13.6+6.4+7.94
=20+7.94
=27.94
(4)10+0.009+0.191
=10+(0.009+0.191)
=10+0.2
=10.2
(5)15-3.7-4.64
=11.3-4.64
=6.66
(6)3.15+1.83+6.85+2.17
=(3.15+6.85)+(1.83+2.17)
=10+4
=14
=12.56-(6.64+3.36)
=12.56-10
=2.56
(2)45.5-(0.98+5.5)
=45.5-5.5-0.98
=40-0.98
=39.02
(3)13.6+7.94+6.4
=13.6+6.4+7.94
=20+7.94
=27.94
(4)10+0.009+0.191
=10+(0.009+0.191)
=10+0.2
=10.2
(5)15-3.7-4.64
=11.3-4.64
=6.66
(6)3.15+1.83+6.85+2.17
=(3.15+6.85)+(1.83+2.17)
=10+4
=14
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