题目内容
【题目】脱式计算。
(371-296)×9 (205-142)÷7 212-8×6
152+72÷9 520-160×3 42÷6×23
2000×3+1860 150×9-120 (406-385)×5
【答案】675;9;164;
160;40;161;
7860;1230;105
【解析】
(371-296)×9
=75×9
=675
(205-142)÷7
=63÷7
=9
212-8×6
=212-48
=164
152+72÷9
=152+8
=160
520-160×3
=520-480
=40
42÷6×23
=7×23
=161
2000×3+1860
=6000+1860
=7860
150×9-120
=1350-120
=1230
(406-385)×5
=21×5
=105
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