题目内容
直接写数对又快 66+8= | 3.8+6.2= | ×= | 47-8= | 3.8÷0.19= |
12÷= | 56÷4= | 24×0.5= | = | 471-299= |
1÷0.25= | = | 600÷5= | 8-0.8= | = |
1.06×8×12.5= | 1.5×0.6= | = | 6.6+4= | 1.5÷0.3= |
= | 1-0.05= | ×4= | = | ÷3= |
-= | 2--= | = | 1-÷ | 1+÷= |
解:66+8=74, | 3.8+6.2=10, | ×=, | 47-8=39, | 3.8÷0.19=20, |
12÷=28, | 56÷4=14, | 24×0.5=12, | =, | 471-299=172, |
1÷0.25=4, | =, | 600÷5=120, | 8-0.8=7.2, | =, |
1.06×8×12.5=106, | 1.5×0.6=0.9, | =, | 6.6+4=10.6, | 1.5÷0.3=5, |
=, | 1-0.05=0.95, | ×4=, | =, | ÷3=, |
-=, | 2--=1, | =, | 1-÷=, | 1+÷=2. |
分析:本题根据分数,小数,整数的加法、减法、乘法、除法的运算法则计算即可.
471-299可根据凑整法计算;
1.06×8×12.5可根据乘法分配律计算.
点评:完成本题在保证做题质量的同时要注意提高做题的速度.
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