1. 观察例子,找出规律,再直接写出其他算式的结果。(9 分)
$12×101 = 1212$ $13×101 = 1313$ $47×101 = $
$52×101 = $
$34×101 = $
$12×101 = 1212$ $13×101 = 1313$ $47×101 = $
4747
$52×101 = $
5252
$28×101 = $2828
$75×101 = $7575
$34×101 = $
3434
$96×101 = $9696
答案:4747 5252 2828 7575 3434 9696
2. 数学课上,王老师出了下面这样一道计算题:(5 分)
$2016 + 2017 + 2018 + 2019 + 2020 + 2021 + 2022 + 2023 + 2024 = ?$
张虎写出了下面的算式,请你填一填。
$2016 + 2017 + 2018 + 2019 + 2020 + 2021 + 2022 + 2023 + 2024 = ($
$2016 + 2017 + 2018 + 2019 + 2020 + 2021 + 2022 + 2023 + 2024 = ?$
张虎写出了下面的算式,请你填一填。
$2016 + 2017 + 2018 + 2019 + 2020 + 2021 + 2022 + 2023 + 2024 = ($
2020
$)×9 = ($18180
$)$答案:2020 18180
3. 找规律,算一算。(5 分)
36÷9 = 4
3366÷99 = 34
333666÷999 = 334
33336666÷9999 = (
……333333666666÷999999 = (
36÷9 = 4
3366÷99 = 34
333666÷999 = 334
33336666÷9999 = (
3334
)……333333666666÷999999 = (
333334
)答案:3334 333334
4. (4 分)用计算器算一算:
$99×99 = ($
$999×999 = ($
不用计算器直接写出:
$9999×9999 = ($
$99999×99999 = ($
$99×99 = ($
9801
$)$$999×999 = ($
998001
$)$不用计算器直接写出:
$9999×9999 = ($
99980001
$)$$99999×99999 = ($
9999800001
$)$答案:9801 998001 99980001 9999800001