题目内容
有简便方法的要用简便方法
(1)
| (2)(
| (3)99999×1.02-33333×0.06. |
(1)
÷
+0.75×8
=
×6+
×8,
=
×(6+8),
=
×14,
=
;
(2)(
+
+
)×12+
=
×12+
×12+
×12+
,
=8+5+(
+
),
=8+5+1,
=14;
(3)99999×1.02-33333×0.06
=99999×1.02-33333×3×0.02,
=99999×1.02-99999×0.02,
=99999×(1.02-0.02),
=99999×1,
=99999.
| 3 |
| 4 |
| 1 |
| 6 |
=
| 3 |
| 4 |
| 3 |
| 4 |
=
| 3 |
| 4 |
=
| 3 |
| 4 |
=
| 21 |
| 2 |
(2)(
| 2 |
| 3 |
| 5 |
| 12 |
| 1 |
| 19 |
| 7 |
| 19 |
=
| 2 |
| 3 |
| 5 |
| 12 |
| 1 |
| 19 |
| 7 |
| 19 |
=8+5+(
| 12 |
| 19 |
| 7 |
| 19 |
=8+5+1,
=14;
(3)99999×1.02-33333×0.06
=99999×1.02-33333×3×0.02,
=99999×1.02-99999×0.02,
=99999×(1.02-0.02),
=99999×1,
=99999.
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