题目内容
【题目】4.5+5.5= 0.43×100= 9.8﹣4.8= 2.5÷100=
0.7+0.23= 100÷1000= 3.4×0.2= 0.9﹣0.09=
0.8×6= 0,5×0.1= 1÷0.5= 5,6÷1=
32﹣6= 2.75+1.25= 2.5×4= 1.25×8=
0.81÷3÷3= 600÷25÷4= 0.125×32×8= 1.7×0.25×4=
【答案】10,43,5,0.025,0.93,0.1,0.68,0.81,4.8,0.05,2,5.6,3,4,10,10,0.09,6,32,1.7
【解析】
试题分析:0.43×100把0.43的小数点向右移动2位即可;32﹣6表示3×3﹣6,所以要先算32,再算减法;0.81÷3÷3,600÷25÷4,根据濑尿虾除以两个数等于除以这两个数的积来简算;
0.125×32×8运用乘法交换律简算;1.7×0.25×4运用乘法结合律简算;其它题目按照运算法则直接求解.
解:4.5+5.5=10,0.43×100=43,9.8﹣4.8=5,2.5÷100=0.025,
0.7+0.23=0.93,100÷1000=0.1,3.4×0.2=0.68,0.9﹣0.09=0.81,
0.8×6=4.8,0.5×0.1=0.05,1÷0.5=2,5.6÷1=5.6,
32﹣6=3,2.75+1.25=4,2.5×4=10,1.25×8=10,
0.81÷3÷3=0.09,600÷25÷4=6,0.125×32×8=32,1.7×0.25×4=1.7.
故此题答案为:10,43,5,0.025,0.93,0.1,0.68,0.81,4.8,0.05,2,5.6,3,4,10,10,0.09,6,32,1.7.
【题目】下面是东风小学三(1)班数学测验成绩记录单。(单位:分)
100 | 85 | 84 | 94 | 100 | 87 | 73 | 93 | 97 | 85 |
95 | 61 | 74 | 92 | 96 | 79 | 65 | 90 | 85 | 84 |
87 | 87 | 86 | 70 | 95 | 78 | 70 | 87 | 85 | 88 |
87 | 90 | 86 | 83 | 86 | 94 | 59 | 81 | 85 | 100 |
(1)请根据上面的数据完成统计表。
分数 | 60以下 | 60~69 | 70~79 | 80~89 | 90~99 | 100 |
人数 | ____ | ____ | ____ | ____ | ____ | ____ |
(2)60分及以上为及格。成绩及格的学生有(______)人,不及格的学生有(______)人,三(1)班共有(______)人。在这次数学测试中,(______)的人数最多,(______)的人数最少。