脱式计算. (105×12-635)÷25 [689-(88+25)]÷32 30×(320-170)÷90 [458-(28+85)
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解决时间 2021-02-11 19:03
- 提问者网友:王者佥
- 2021-02-11 07:11
脱式计算. (105×12-635)÷25 [689-(88+25)]÷32 30×(320-170)÷90 [458-(28+85)
最佳答案
- 五星知识达人网友:持酒劝斜阳
- 2021-02-11 07:34
(1)(105×12-635)÷25,
=(1260-635)÷25,
=625÷25,
=25;
(2)[689-(88+25)]÷32,
=[689-113]÷32,
=576÷32,
=18;
(3)30×(320-170)÷90,
=30×150÷90,
=4500÷90,
=50;
(4)[458-(28+85)]÷23,
=[458-113]÷23,
=345÷23,
=15.
=(1260-635)÷25,
=625÷25,
=25;
(2)[689-(88+25)]÷32,
=[689-113]÷32,
=576÷32,
=18;
(3)30×(320-170)÷90,
=30×150÷90,
=4500÷90,
=50;
(4)[458-(28+85)]÷23,
=[458-113]÷23,
=345÷23,
=15.
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