用简便方法计算
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(1)原式= +( + )=1 ![]() | (2)原式= -( + )= ![]() | (3)原式=( + )+( + )=2 |
(4)原式= + -![]() = ![]() | (5)原式= + +( - )=1 ![]() | (6)原式= + -![]() = ![]() |
编辑:chaxungu时间:2026-04-27 14:04:40分类:小学数学题库
用简便方法计算
|
(1)原式= +( + )=1 ![]() | (2)原式= -( + )= ![]() | (3)原式=( + )+( + )=2 |
(4)原式= + -![]() = ![]() | (5)原式= + +( - )=1 ![]() | (6)原式= + -![]() = ![]() |