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0.15+0.5= 0.2÷0.1= 1.8×6= 1-0.23=
2.5×4= 6÷5= 20×0.5= 0.39÷3=
1.05×5= 2.16+3.84= 4.8÷1.6= 10-4.3=
分析:0.15+0.5注意0.5是一位小数,不要算成0.2;0.2÷0.1先把0.1根据商不变规律化成1再计算;1.05×5注意因数中间有0的乘法;其它题目根据运算法则直接求解.
解答:解:
0.15+0.5=0.65, 0.2÷0.1=2, 1.8×6=10.8, 1-0.23=0.77,
2.5×4=10, 6÷5=1.2, 20×0.5=10, 0.39÷3=0.13,
1.05×5=5.25, 2.16+3.84=6, 4.8÷1.6=3, 10-4.3=5.7.
故答案为:0.65,2,10.8,0.77,10,1.2,10,0.13,5.25,6,3,5.7.
点评:本题考查了基本的计算,计算时要细心,注意小数点的位置.
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