题目内容
怎样算简便就怎样算.
| (1)4.32+5.43+6.68 | (2)15.17-6.8-3.2 | (3)34.82-(4.82+15.2) |
| (4)15.27+4.72-5.28 | (5)4.02-3.5+0.98 | (6)5.8-4.5+5.8-4.5. |
(1)4.32+5.43+6.68
=4.32+6.68+5.43,
=11+5.43,
=16.43;
(2)15.17-6.8-3.2
=15.17-(6.8+3.2),
=15.17-10,
=5.17;
(3)34.82-(4.82+15.2)
=34.82-4.82-15.2,
=30-15.2,
=14.8;
(4)15.27+4.72-5.28
=19.99-5.28,
=14.71;
(5)4.02-3.5+0.98
=4.02+0.98-3.5,
=5-3.5,
=1.5;
(6)5.8-4.5+5.8-4.5
=5.8+5.8-(4.5+4.5),
=11.6-9,
=2.6.
=4.32+6.68+5.43,
=11+5.43,
=16.43;
(2)15.17-6.8-3.2
=15.17-(6.8+3.2),
=15.17-10,
=5.17;
(3)34.82-(4.82+15.2)
=34.82-4.82-15.2,
=30-15.2,
=14.8;
(4)15.27+4.72-5.28
=19.99-5.28,
=14.71;
(5)4.02-3.5+0.98
=4.02+0.98-3.5,
=5-3.5,
=1.5;
(6)5.8-4.5+5.8-4.5
=5.8+5.8-(4.5+4.5),
=11.6-9,
=2.6.
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