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脱式计算(70.2×0.6-2.12)÷70(34-13+56)×123.5×37+5.5×80%+0.820.07×1994-19.93×200736.25-(19.8-3.75)-4.2.
题目详情
脱式计算
(70.2×0.6-2.12)÷70
(
-
+
)×12
3.5×
+5.5×80%+0.8
20.07×1994-19.93×2007
36.25-(19.8-3.75)-4.2.
(70.2×0.6-2.12)÷70
(
3 |
4 |
1 |
3 |
5 |
6 |
3.5×
3 |
7 |
20.07×1994-19.93×2007
36.25-(19.8-3.75)-4.2.
▼优质解答
答案和解析
(1)(70.2×0.6-2.12)÷70
=(42.12-2.12)÷70
=40÷70
=
(2)(
-
+
)×12
=
×12-
×12+
×12
=9-4+10
=15
(3)3.5×
+5.5×80%+0.8
=1.5+4.4+0.8
=6.7
(4)20.07×1994-19.93×2007
=2007×19.94-19.93×2007
=2007×(19.94-19.93)
=2007×0.01
=20.07
(5)36.25-(19.8-3.75)-4.2
=36.25-19.8+3.75-4.2
=36.25+3.75-(19.8+4.2)
=40-24
=16
=(42.12-2.12)÷70
=40÷70
=
4 |
7 |
(2)(
3 |
4 |
1 |
3 |
5 |
6 |
=
3 |
4 |
1 |
3 |
5 |
6 |
=9-4+10
=15
(3)3.5×
3 |
7 |
=1.5+4.4+0.8
=6.7
(4)20.07×1994-19.93×2007
=2007×19.94-19.93×2007
=2007×(19.94-19.93)
=2007×0.01
=20.07
(5)36.25-(19.8-3.75)-4.2
=36.25-19.8+3.75-4.2
=36.25+3.75-(19.8+4.2)
=40-24
=16
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