题目内容
【题目】直接写数对又快.
3.5×4= 8.2+2.08= 36÷0.01= 99+1÷10=
6﹣2.4×2= 4÷0.5= 2÷25= 0.25×0.4=
0.46÷4.6= 0.27÷0.3×0.3= 6.9﹣6.9×0= 7.5×2.5×4=
4.3×101﹣4.3= 1÷0.1﹣9×0.1= 37.2×99+37.2= 7.1﹣0.6﹣0.4=
【答案】14,10.28,3600,99.1,1.2,8,0.08,0.1,0.1,0.27,6.9,75,430,9.1,372,6.1
【解析】
试题分析:本题根据小数加法、减法、乘法、除法的运算法则及四则混合运算的运算顺序计算即可;
7.5×2.5×4可根据乘法结合律计算;
4.3×101﹣4.3、37.2×99+37.2可根据乘法分配律计算;
7.1﹣0.6﹣0.4可根据一个数减两个数,等于用这个数减去这两个数的和的减法性质进行计算.
解:3.5×4=14, 8.2+2.08=10.28, 36÷0.01=3600, 99+1÷10=99.1,
6﹣2.4×2=1.2, 4÷0.5=8, 2÷25=0.08, 0.25×0.4=0.1,
0.46÷4.6=0.1, 0.27÷0.3×0.3=0.27, 6.9﹣6.9×0=6.9, 7.5×2.5×4=75,
4.3×101﹣4.3=430, 1÷0.1﹣9×0.1=9.1, 37.2×99+37.2=372, 7.1﹣0.6﹣0.4=6.1.
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