
脱式计算,能简算的要简算并写出主要过程.29×0.375÷6789×1011+1011×19(0.75-516)÷(38+12)
脱式计算,能简算的要简算并写出主要过程.29×0.375÷6789×1011+1011×19(0.75-516)÷(38+12)...
脱式计算,能简算的要简算并写出主要过程.29×0.375÷6789×1011+1011×19(0.75-516)÷(38+12)
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(1)
×0.375÷
,
=
×
×
,
=
;
(2)
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(3)(0.75-
)÷(
+
),
=(
-
)÷
,
=
×
,
=
.
2 |
9 |
6 |
7 |
=
2 |
9 |
3 |
8 |
7 |
6 |
=
7 |
72 |
(2)
8 |
9 |
10 |
11 |
10 |
11 |
1 |
9 |
=(
8 |
9 |
1 |
9 |
10 |
11 |
=1×
10 |
11 |
=
10 |
11 |
(3)(0.75-
5 |
16 |
3 |
8 |
1 |
2 |
=(
3 |
4 |
5 |
16 |
7 |
8 |
=
7 |
16 |
8 |
7 |
=
1 |
2 |
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