题目内容
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1.25:0.25= 5 5 |
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65×0.2= 13 13 |
9.8-0.98= 8.82 8.82 | ||||||||||||||||
1-0.1×0.1= 0.99 0.99 |
0.13×7= 0.91 0.91 |
0.7+3= 3.7 3.7 | ||||||||||||||||
1.2×0.8= 9.6 9.6 |
0.9×7= 6.3 6.3 |
6.3÷0.021= 300 300 | ||||||||||||||||
1.5÷0.03= 50 50 |
6.8-2.4÷3= 6 6 |
5×0.7= 3.5 3.5 | ||||||||||||||||
0.43×5= 2.15 2.15 |
3.6÷0.9-4= 0 0 |
3.6-0.36×10= 0 0 | ||||||||||||||||
8.1-2.2= 5.9 5.9 |
0.6÷0.3+0.5= 2.5 2.5 . |
分析:根据比的意义,就是除法运算来解决前两个题;然后根据分数、小数的减法、除法、乘法、加法和混合运算方法和灵活运用简便方法来口算解决问题,即可得解.
解答:解:
故答案为:
,5,
,
,13,8.82,0.99,0.91,3.7,9.6,6.3,300,50,6,3.5,2.15,0,0,5.9,2.5.
|
1.25:0.25=5 |
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|
65×0.2=13 | 9.8-0.98=8.82 | ||||||||||||
1-0.1×0.1=0.99 | 0.13×7=0.91 | 0.7+3=3.7 | ||||||||||||
1.2×0.8=9.6 | 0.9×7=6.3 | 6.3÷0.021=300 | ||||||||||||
1.5÷0.03=50 | 6.8-2.4÷3=6 | 5×0.7=3.5 | ||||||||||||
0.43×5=2.15 | 3.6÷0.9-4=0 | 3.6-0.36×10=0 | ||||||||||||
8.1-2.2=5.9 | 0.6÷0.3+0.5=2.5 |
5 |
7 |
2 |
3 |
4 |
45 |
点评:口算时,注意运算符号和数据,然后再进一步计算.
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