6.3小数加减法简便运算1. 算一算,比一比。(1)6.28+13.75+3.72 (2)42.516.125.88(3)45.6(15.6+12.72)13.75+(6.28+3.72) 42.5(16.12+5.88) 45.615.612.722. 在下面的 里填上合适的运算符号,在里填上合适的数。(1)78.635.4714.5378.6 ( )(2)2.7+15.32+4.68+17.3(2.7 ) (15.32 )(3)25.63(1.63+7.85)25.63 3. 用简便方法计算。3.54+27.5+4.46 35.7+4.895.743.812.4517.55 2.36+0.67+0.64+3.334. 爸爸星期天上街买菜,买肉用去12.44元,买鱼用去7.6元,买蔬菜用去7.56元。爸爸买菜共用去多少元钱?5. 王芳带了15.6元钱,买一枝钢笔用去6.4元,买一瓶墨水用去3.6元。还剩多少元?答案:1. (1)23.7523.75 (2)20.520.5 (3)17.2817.282. (1)78.6(35.47+14.53)(2)(2.7+17.3)+(15.32+4.68) (3)25.631.637.853. 35.5 34.89 13.8 74. 12.44+7.6+7.56=27.6元5. 15.66.43.65.6(元)2