脱式计算.(能简算的要简算)4.6-(1.42+2.07)12.4-6.7-3.33.78+4.86+0.78 &nbs...
脱式计算.(能简算的要简算)4.6-(1.42+2.07)12.4-6.7-3.33.78+4.86+0.788.6+4.75-7.47....
脱式计算.(能简算的要简算)4.6-(1.42+2.07)12.4-6.7-3.33.78+4.86+0.78 8.6+4.75-7.47.
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(1)4.6-(1.42+2.07)
=4.6-3.49
=1.11;
(2)12.4-6.7-3.3
=12.4-(6.7+3.3)
=12.4-10
=2.4;
(3)3.78+4.86+0.78
=8.64+0.78
=9.42;
(4)8.6+4.75-7.47
=13.35-7.47
=5.88.
=4.6-3.49
=1.11;
(2)12.4-6.7-3.3
=12.4-(6.7+3.3)
=12.4-10
=2.4;
(3)3.78+4.86+0.78
=8.64+0.78
=9.42;
(4)8.6+4.75-7.47
=13.35-7.47
=5.88.
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