用简便方法计算(1)8.37-3.25-(1.37+2.25)(2)3.375÷514-38×421(3)9÷13+13÷9+11÷13+14÷9+6÷
用简便方法计算(1)8.37-3.25-(1.37+2.25)(2)3.375÷514-38×421(3)9÷13+13÷9+11÷13+14÷9+6÷13(4)9966...
用简便方法计算(1)8.37-3.25-(1.37+2.25)(2)3.375÷514-38×421(3)9÷13+13÷9+11÷13+14÷9+6÷13 (4)9966×6+6678×18.
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(1)8.37-3.25-(1.37+2.25)
=8.37-3.25-1.37-2.25
=8.37-1.37-(3.25+1.25)
=7-4.5
=2.5
(2)3.375÷5
-
×
=
×
?
×
=(
?
)×
=3×
=
(3)9÷13+13÷9+11÷13+14÷9+6÷13
=
+
+
+
+
=(
+
+
)+(
+
)
=2+3
=5
(4)9966×6+6678×18
=3322×3×6+6678×18
=3322×18+6678×18
=(3322+6678)×18
=10000×18
=180000
=8.37-3.25-1.37-2.25
=8.37-1.37-(3.25+1.25)
=7-4.5
=2.5
(2)3.375÷5
1 |
4 |
3 |
8 |
4 |
21 |
=
27 |
8 |
4 |
21 |
3 |
8 |
4 |
21 |
=(
27 |
8 |
3 |
8 |
4 |
21 |
=3×
4 |
21 |
=
4 |
7 |
(3)9÷13+13÷9+11÷13+14÷9+6÷13
=
9 |
13 |
13 |
9 |
11 |
13 |
14 |
9 |
6 |
13 |
=(
9 |
13 |
11 |
13 |
6 |
13 |
13 |
9 |
14 |
9 |
=2+3
=5
(4)9966×6+6678×18
=3322×3×6+6678×18
=3322×18+6678×18
=(3322+6678)×18
=10000×18
=180000
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