题目内容
计算.
8-
×
÷4
9.6÷3.2+5.1×4
×(
÷
+
)
60×(
-
+
)
8-
1 |
5 |
5 |
7 |
9.6÷3.2+5.1×4
4 |
9 |
3 |
10 |
3 |
5 |
2 |
5 |
60×(
3 |
4 |
2 |
3 |
2 |
5 |
考点:整数、分数、小数、百分数四则混合运算
专题:运算顺序及法则
分析:(1)先算乘除,再算减法.
(2)先算除法和乘法,再算加法.
(3)先算括号内的除法,再算括号内的加法,最后算括号外的乘法.
(4)运用乘法分配律简算.
(2)先算除法和乘法,再算加法.
(3)先算括号内的除法,再算括号内的加法,最后算括号外的乘法.
(4)运用乘法分配律简算.
解答:
解:(1)8-
×
÷4
=8-
×
×
=8-
=7
(2)9.6÷3.2+5.1×4
=3+20.4
=23.4
(3)
×(
÷
+
)
=
×(
×
+
)
=
×(
+
)
=
×
=
(4)60×(
-
+
)
=60×
-60×
+60×
=45-40+24
=29
1 |
5 |
5 |
7 |
=8-
1 |
5 |
5 |
7 |
1 |
4 |
=8-
1 |
28 |
=7
27 |
28 |
(2)9.6÷3.2+5.1×4
=3+20.4
=23.4
(3)
4 |
9 |
3 |
10 |
3 |
5 |
2 |
5 |
=
4 |
9 |
3 |
10 |
5 |
3 |
2 |
5 |
=
4 |
9 |
1 |
2 |
2 |
5 |
=
4 |
9 |
9 |
10 |
=
2 |
5 |
(4)60×(
3 |
4 |
2 |
3 |
2 |
5 |
=60×
3 |
4 |
2 |
3 |
2 |
5 |
=45-40+24
=29
点评:此题考查了小数、分数的四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
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