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计算:①5+10+15+20+25+30+35==;②17+27+37+47+57=;③0+0.22+0.33+0.44==;④777×0.826+223×0.826==;⑤111×4444+778×2222==;⑥666×0.11+222×0.67==.
题目详情
计算:
①5+10+15+20+25+30+35=___=___;
②
+
+
+
+
=___;
③0+0.22+0.33+0.44=___=___;
④777×0.826+223×0.826=___=___;
⑤111×4444+778×2222=___=___;
⑥666×0.11+222×0.67=___=___.
①5+10+15+20+25+30+35=___=___;
②
1 |
7 |
2 |
7 |
3 |
7 |
4 |
7 |
5 |
7 |
③0+0.22+0.33+0.44=___=___;
④777×0.826+223×0.826=___=___;
⑤111×4444+778×2222=___=___;
⑥666×0.11+222×0.67=___=___.
▼优质解答
答案和解析
①5+10+15+20+25+30+35=5×(1+2+3+…+7)=28;
②
+
+
+
+
=
×(1+2+3+4+5)=
;
③0.11+0.22+0.33+0.44=0.11×(1+2+3+4)=1.1;
④777×0.826+223×0.826=0.826×1000=826;
⑤111×4444+778×2222=2222×(222+778)=2222000;
⑥666×0.11+222×0.67=222×(0.33+0.67)=222.
故答案为:5×(1+2+3+…+7),28;
×(1+2+3+4+5),
;0.11×(1+2+3+4),1.1;0.826×1000,826;2222×(222+778),2222000;222×(0.33+0.67),222.
②
1 |
7 |
2 |
7 |
3 |
7 |
4 |
7 |
5 |
7 |
1 |
7 |
15 |
7 |
③0.11+0.22+0.33+0.44=0.11×(1+2+3+4)=1.1;
④777×0.826+223×0.826=0.826×1000=826;
⑤111×4444+778×2222=2222×(222+778)=2222000;
⑥666×0.11+222×0.67=222×(0.33+0.67)=222.
故答案为:5×(1+2+3+…+7),28;
1 |
7 |
15 |
7 |
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