题目内容

1
6
×
3
8
+
5
6
×
5
8
=(
1
6
+
5
6
)×(
3
8
+
5
8
)=1×1=1．
×
×
．
分析：通过观察，此题应先算乘法，再算加法．因此，原题计算错误．
解答：解：
1
6
×
3
8
+
5
6
×
5
8
，
=
1
16
+
25
48
，
=
7
12
；
故答案为：×．
点评：此题主要考查了四则混合运算的运算顺序．
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3
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10
÷
3
5
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1
6
×
3
8
=
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6
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1
2
=		 6.8÷10%=
3
10
×
5
12
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11
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2
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12
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2
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8
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2
3
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8
÷
2
3
=
1
6
+
2
5
=
2
3
×
3
4
=		 1+
1
2
-0.4=
1
4
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1
3
+
2
9
=
6
7
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1
4
+
1
2
=
5
6
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8
9
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9
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9
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2
5
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1
4
）=
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3
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6
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3
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2
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3
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8
）=
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11
）=
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6
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4
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4
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4
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5
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8
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4
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8
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1
4
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1
4
）=		 （
1
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+
5
6
）×24=		 10（3+
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）=
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1
2
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3
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1
2
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3
）=
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+
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5
÷
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+
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5
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10
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2
5
=
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9
）+（2+
4
9
）=
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9
）+（1+
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）=
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+
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+
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=
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8
+
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×16=
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+
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=

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