用简便方法计算. 6.3+8.7+8.7×3.7
答案:1 悬赏:10 手机版
解决时间 2021-04-13 13:27
- 提问者网友:做自己de王妃
- 2021-04-13 09:15
用简便方法计算. 6.3+8.7+8.7×3.7
最佳答案
- 五星知识达人网友:鸽屿
- 2021-04-13 09:30
(1)6.3+8.7+8.7×3.7,
=(6.3+8.7)+8.7×3.7,
=15+32.19,
=47.19;
(2)1.5×8.4+3×0.3+15×10%,
=1.5×8.4+0.9+1.5×1,
=1.5×(8.4+1)+0.9,
=1.5×9.4+0.9,
=1.5×(10-0.6)+0.9,
=15-0.9+0.9,
=15.
=(6.3+8.7)+8.7×3.7,
=15+32.19,
=47.19;
(2)1.5×8.4+3×0.3+15×10%,
=1.5×8.4+0.9+1.5×1,
=1.5×(8.4+1)+0.9,
=1.5×9.4+0.9,
=1.5×(10-0.6)+0.9,
=15-0.9+0.9,
=15.
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