题目内容
脱式计算.(能简算的要简算)
(1)
+
+
+
(2)6.75-2.75÷[10×(9.75-4
)]
(3)0.365×640+3
×36.5+365×0.01.
(1)
| 1 |
| 43 |
| 303 |
| 8686 |
| 90909 |
| 434343 |
| 131313 |
| 868686 |
(2)6.75-2.75÷[10×(9.75-4
| 1 |
| 4 |
(3)0.365×640+3
| 1 |
| 2 |
(1)
+
+
+
,
=
+
+
+
,
=
+
+
+
,
=(
+
)+(
+
),
=
+
,
=
;
(2)6.75-2.75÷[10×(9.75-4
)],
=6.75-2.75÷[10×(9.75-4.25)],
=6.75-2.75÷[10×5.5],
=6.75-2.75÷55,
=6.75-0.05,
=6.7;
(3)0.365×640+3
×36.5+365×0.01,
=36.5×6.4+3.5×36.5+36.5×0.1,
=36.5×(6.4+3.5+0.1),
=36.5×10,
=365.
| 1 |
| 43 |
| 303 |
| 8686 |
| 90909 |
| 434343 |
| 131313 |
| 868686 |
=
| 1 |
| 43 |
| 3×101 |
| 86×101 |
| 9×10101 |
| 43×10101 |
| 13×10101 |
| 86×10101 |
=
| 1 |
| 43 |
| 3 |
| 86 |
| 9 |
| 43 |
| 13 |
| 86 |
=(
| 1 |
| 43 |
| 9 |
| 43 |
| 3 |
| 86 |
| 13 |
| 86 |
=
| 10 |
| 43 |
| 8 |
| 43 |
=
| 18 |
| 43 |
(2)6.75-2.75÷[10×(9.75-4
| 1 |
| 4 |
=6.75-2.75÷[10×(9.75-4.25)],
=6.75-2.75÷[10×5.5],
=6.75-2.75÷55,
=6.75-0.05,
=6.7;
(3)0.365×640+3
| 1 |
| 2 |
=36.5×6.4+3.5×36.5+36.5×0.1,
=36.5×(6.4+3.5+0.1),
=36.5×10,
=365.
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