题目内容
脱式计算.(能简算的要简算)
①14.8-44.08÷5.8
②7.5×
+7.5÷
③
+
+
÷4
④3.35×6.4×2+6.7×3.6.
①14.8-44.08÷5.8
②7.5×
| 2 |
| 3 |
| 3 |
| 4 |
③
| 1 |
| 4 |
| 3 |
| 7 |
| 4 |
| 7 |
④3.35×6.4×2+6.7×3.6.
①14.8-44.08÷5.8,
=14.8-7.6,
=7.2;
②7.5×
+7.5÷
,
=7.5×
+7.5×
,
=7.5×(
+
),
=7.5×2,
=15;
③
+
+
÷4,
=
+
+
×
,
=
+
+
,
=
+(
+
),
=
+
,
=
;
④3.35×6.4×2+6.7×3.6,
=(3.35×2)×6.4+6.7×3.6,
=6.7×6.4+6.7×3.6,
=6.7×(6.4+3.6),
=6.7×10,
=67.
=14.8-7.6,
=7.2;
②7.5×
| 2 |
| 3 |
| 3 |
| 4 |
=7.5×
| 2 |
| 3 |
| 4 |
| 3 |
=7.5×(
| 2 |
| 3 |
| 4 |
| 3 |
=7.5×2,
=15;
③
| 1 |
| 4 |
| 3 |
| 7 |
| 4 |
| 7 |
=
| 1 |
| 4 |
| 3 |
| 7 |
| 4 |
| 7 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 3 |
| 7 |
| 1 |
| 7 |
=
| 1 |
| 4 |
| 3 |
| 7 |
| 1 |
| 7 |
=
| 1 |
| 4 |
| 4 |
| 7 |
=
| 23 |
| 28 |
④3.35×6.4×2+6.7×3.6,
=(3.35×2)×6.4+6.7×3.6,
=6.7×6.4+6.7×3.6,
=6.7×(6.4+3.6),
=6.7×10,
=67.
练习册系列答案
相关题目