1 用计算器计算下面各题。
$7482÷(267-138)$
$(116+208)×634$
$7482÷(267-138)$
$(116+208)×634$
答案
1. 58,205416
2 先用计算器算出每组前三道题的得数,找一找有什么规律,再直接写出后面一题的得数。你能试着再写出一道算式吗?
$1×9+2=$
$12×9+3=$
$123×9+4=$
$1234×9+5=$
$\_\_\_\_\_\_ × \_\_\_\_\_\_ + \_\_\_\_\_\_ = \_\_\_\_\_\_$
$(10-2)÷8=$
$(100-12)÷8=$
$(1000-112)÷8=$
$(10000-1112)÷8=$
$(\_\_\_\_\_\_ - \_\_\_\_\_\_) ÷ \_\_\_\_\_\_ = \_\_\_\_\_\_$
$9×9=$
$99×99=$
$999×999=$
$9999×9999=$
$99999×99999=$
$\_\_\_\_\_\_ × \_\_\_\_\_\_ = \_\_\_\_\_\_$
$1×9+2=$
$12×9+3=$
$123×9+4=$
$1234×9+5=$
$\_\_\_\_\_\_ × \_\_\_\_\_\_ + \_\_\_\_\_\_ = \_\_\_\_\_\_$
$(10-2)÷8=$
$(100-12)÷8=$
$(1000-112)÷8=$
$(10000-1112)÷8=$
$(\_\_\_\_\_\_ - \_\_\_\_\_\_) ÷ \_\_\_\_\_\_ = \_\_\_\_\_\_$
$9×9=$
$99×99=$
$999×999=$
$9999×9999=$
$99999×99999=$
$\_\_\_\_\_\_ × \_\_\_\_\_\_ = \_\_\_\_\_\_$
答案
2. 11, 111, 1111, 11111
12345×9+6 = 111111
1, 11, 111, 1111
(100000-11112)÷8=11111
81, 9801, 998001, 99980001, 9999800001
999999×999999=999998000001
12345×9+6 = 111111
1, 11, 111, 1111
(100000-11112)÷8=11111
81, 9801, 998001, 99980001, 9999800001
999999×999999=999998000001
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