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用简便方法计算. (1)5.6+13.38+9.62+24.4 (2)28-13.31-6.69 (4)43.06-4.56+6.94

编辑:chaxungu时间:2026-04-27 13:34:06分类:小学数学题库

用简便方法计算。
(1)5.6+13.38+9.62+24.4(2)28-13.31-6.69
(3)324.08-(24.08+13.6)(4)43.06-4.56+6.94
(1)原式=5.6+24.4+(13.38+9.62)
=30+23
=53
(2)原式=28-(13.31+6.69)
=28-20
=8
(3)原式=324.08-24.08-13.6
=300-13.6
=286.4
(4)原式= 43.06+6.94-4.56
= 50-4.56
= 45.44