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①−12+13;②(−37)×(−45)÷(−127);③(23−14−38)×48④4.8-(-1.2)+(-3)⑤2.75−[(−512)−(−0.5)+(−314)];⑥−7×(−227)+26×(−227)−2×227(简便计算)
题目详情
①−
+
;
②(−
)×(−
)÷(−
);
③(
−
−
)×48
④4.8-(-1.2)+(-3)
⑤2.75−[(−5
)−(−0.5)+(−3
)];
⑥−7×(−
)+26×(−
)−2×
(简便计算)
1 |
2 |
1 |
3 |
②(−
3 |
7 |
4 |
5 |
12 |
7 |
③(
2 |
3 |
1 |
4 |
3 |
8 |
④4.8-(-1.2)+(-3)
⑤2.75−[(−5
1 |
2 |
1 |
4 |
⑥−7×(−
22 |
7 |
22 |
7 |
22 |
7 |
▼优质解答
答案和解析
①原式=−(
−
)
=−
;
②原式=-
×
×
=-
;
③原式=32-12-18
=2;
④原式=4.8+1.2-3
=3;
⑤原式=2.75-(-5.5+0.5-3.25)
=2.75-(-8.25)
=11;
⑥原式=(−7+26+2)×(−
)
=21×(−
)
=-66.
2 |
6 |
1 |
6 |
=−
1 |
6 |
②原式=-
3 |
7 |
4 |
5 |
7 |
12 |
=-
1 |
5 |
③原式=32-12-18
=2;
④原式=4.8+1.2-3
=3;
⑤原式=2.75-(-5.5+0.5-3.25)
=2.75-(-8.25)
=11;
⑥原式=(−7+26+2)×(−
22 |
7 |
=21×(−
22 |
7 |
=-66.
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