题目内容
脱式计算(能简算的要简算)
(
|
| 7.6×35%+6.5×0.76 |
|
(1)(
+
)÷
+
,
=
÷
+
,
=
+
,
=
;
(2)
×
+
×
,
=(
+
)×
,
=
×
,
=
;
(3)7.6×35%+6.5×0.76,
=7.6×0.35+0.65×7.6,
=7.6×(0.35+0.65),
=7.6×1,
=7.6;
(4)
×21+13×
,
=
×13+13×
,
=(
+
)×13,
=1×13,
=13.
| 4 |
| 5 |
| 1 |
| 4 |
| 7 |
| 3 |
| 7 |
| 10 |
=
| 21 |
| 20 |
| 7 |
| 3 |
| 7 |
| 10 |
=
| 9 |
| 20 |
| 14 |
| 20 |
=
| 23 |
| 20 |
(2)
| 5 |
| 19 |
| 1 |
| 4 |
| 13 |
| 19 |
| 1 |
| 4 |
=(
| 5 |
| 19 |
| 13 |
| 19 |
| 1 |
| 4 |
=
| 18 |
| 19 |
| 1 |
| 4 |
=
| 9 |
| 38 |
(3)7.6×35%+6.5×0.76,
=7.6×0.35+0.65×7.6,
=7.6×(0.35+0.65),
=7.6×1,
=7.6;
(4)
| 13 |
| 49 |
| 28 |
| 49 |
=
| 21 |
| 49 |
| 28 |
| 49 |
=(
| 21 |
| 49 |
| 28 |
| 49 |
=1×13,
=13.
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