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脱式计算,能简算的要简算.2.79×4.64+2.79×4.36+2.7945.45÷9÷523+59-23+59.

题目详情
脱式计算,能简算的要简算.
2.79×4.64+2.79×4.36+2.79      
45.45÷9÷5       
2
3
+
5
9
-
2
3
+
5
9



2
3
+
5
9
-
2
3
+
5
9
2
3
2233
5
9
-
2
3
+
5
9
5
9
5599
2
3
+
5
9
2
3
2233
5
9
5
9
5599
▼优质解答
答案和解析
(1)2.79×4.64+2.79×4.36+2.79,
=2.79×(4.64+4.36+1),
=2.79×10,
=27.9;

(2)45.45÷9÷5,
(1)2.79×4.64+2.79×4.36+2.79,
=2.79×(4.64+4.36+1),
=2.79×10, (1)2.79×4.64+2.79×4.36+2.79,
=2.79×(4.64+4.36+1),
=2.79×10,(1)2.79×4.64+2.79×4.36+2.79,
=2.79×(4.64+4.36+1),
=2.79×10, =27.9; =27.9;=27.9;
(2)45.45÷9÷5,
(2)45.45÷9÷5,
(2)45.45÷9÷5, =45.45÷(9×5),
=45.45÷45,
=1.01;

(3)
2
3
+
5
9
-
2
3
+
5
9

=(
2
3
-
2
3
)+(
5
9
+
5
9
),
=
10
9
2
3
222333+
5
9
-
2
3
+
5
9

=(
2
3
-
2
3
)+(
5
9
+
5
9
),
=
10
9
5
9
555999-
2
3
+
5
9

=(
2
3
-
2
3
)+(
5
9
+
5
9
),
=
10
9
2
3
222333+
5
9

=(
2
3
-
2
3
)+(
5
9
+
5
9
),
=
10
9
5
9
555999,
=(
2
3
-
2
3
)+(
5
9
+
5
9
),
=
10
9
2
3
222333-
2
3
)+(
5
9
+
5
9
),
=
10
9
2
3
222333)+(
5
9
+
5
9
),
=
10
9
5
9
555999+
5
9
),
=
10
9
5
9
555999),
=
10
9
10
9
101010999.