一道简单的奥数题(小数的巧算与速算)
发布网友
发布时间:2022-12-31 10:43
我来回答
共3个回答
热心网友
时间:2023-11-02 13:23
解:36×2.54+1.8×49.2
=3.6×25.4+1.8×49.2
=1.8×2×25.4+1.8×49.2
=1.8×(50.8+49.2)
=1.8×100
=180.
热心网友
时间:2023-11-02 13:23
原式=36x2.54+(1.8x2)x(49.2/2)
=36x2.54+3.6x24.6
=36x2.54+36x2.46
=36x(2.54+2.46)
=36x5=180
热心网友
时间:2023-11-02 13:24
36×2.54+1.8×49.2
=36×2.54+36×2.46
=36×(2.54+2.46)
=36×5
=180