题目内容
直接写出得数.
1.53-0.5= | 7.8+0.9= | 7.5-2.5= |
12÷0.4= | 0.56+4.44= | 2.9+3.7+2.1= |
4×0.25= | 1.25×5×8= | 7.6×8+2.4×8= |
分析:2.9+3.7+2.1运用加法交换律简算;1.25×5×8运用乘法交换律简算;7.6×8+2.4×8运用乘法分配律简算;其它题目按照运算法则直接求解.
解答:解:1.53-0.5=1.03,7.8+0.9=8.7,7.5-2.5=5,12÷0.4=30,0.56+4.44=5,
2.9+3.7+2.1=8.7,4×0.25=1,1.25×5×8=50,7.6×8+2.4×8=80.
故答案为:1.03,8.7,5,30,5,8.7,1,50,80.
2.9+3.7+2.1=8.7,4×0.25=1,1.25×5×8=50,7.6×8+2.4×8=80.
故答案为:1.03,8.7,5,30,5,8.7,1,50,80.
点评:此题考查了基本的小数加减法、小数乘除法的计算,计算时要细心,先看算式能不能用简便方法求解.
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