题目内容
计算,能简算的要简算
| 1.2-0.5×1.8÷0.9 | 8×7×1.25 | ||||||||||||||||
|
(
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|
|
(1)1.2-0.5×1.8÷0.9,
=1.2-0.5×(1.8÷0.9),
=1.2-0.5×2,
=1.2-1,
=0.2;
(2)8×7×1.25,
=(8×1.25)×7,
=10×7,
=70;
(3)
×
×3+
×
,
=(
×3)×
+
×
,
=(
+
)×
,
=2×
,
=
;
(4)(
-
÷
)×
,
=(
-
×
)×
,
=(1-
)×
×
,
=
×
,
=
;
(5)
×8.8+0.6×
+60%,
=0.6×8.8+0.6×0.2+0.6,
=0.6×(8.8+0.2+1),
=0.6×10,
=6;
(6)
×[(
-
)×
],
=
×[
×
],
=
×
×
,
=
.
=1.2-0.5×(1.8÷0.9),
=1.2-0.5×2,
=1.2-1,
=0.2;
(2)8×7×1.25,
=(8×1.25)×7,
=10×7,
=70;
(3)
| 5 |
| 16 |
| 11 |
| 19 |
| 27 |
| 19 |
| 15 |
| 16 |
=(
| 5 |
| 16 |
| 11 |
| 19 |
| 27 |
| 19 |
| 15 |
| 16 |
=(
| 11 |
| 19 |
| 27 |
| 19 |
| 15 |
| 16 |
=2×
| 15 |
| 16 |
=
| 15 |
| 8 |
(4)(
| 3 |
| 8 |
| 3 |
| 8 |
| 8 |
| 3 |
| 16 |
| 9 |
=(
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
| 16 |
| 9 |
=(1-
| 3 |
| 8 |
| 3 |
| 8 |
| 16 |
| 9 |
=
| 5 |
| 8 |
| 2 |
| 3 |
=
| 5 |
| 12 |
(5)
| 3 |
| 5 |
| 1 |
| 5 |
=0.6×8.8+0.6×0.2+0.6,
=0.6×(8.8+0.2+1),
=0.6×10,
=6;
(6)
| 7 |
| 25 |
| 3 |
| 7 |
| 1 |
| 14 |
| 5 |
| 6 |
=
| 7 |
| 25 |
| 5 |
| 14 |
| 5 |
| 6 |
=
| 7 |
| 25 |
| 5 |
| 14 |
| 5 |
| 6 |
=
| 1 |
| 12 |
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